Hot-dip Galvanized Bolt with Washer and Nut High Strength Carbon Steel Best Quality China Manufacturer DIN931

Hot-dip Galvanized Bolts Introduction

Hot-dip galvanized bolts are widely used in power facilities, construction industry, petrochemical industry, machinery manufacturing, transportation facilities and other fields.

The hot-dip galvanizing process refers to the method of immersing fasteners in a zinc solution at 450~560°C to form a layer of zinc coating on the surface of the fasteners.

The thickness of the zinc layer is generally 30-100 microns. The galvanized layer of hot-dip galvanized bolt has good anti-corrosion effect, good hardness, strong adhesion, and is not easy to fall off.

Hot-dip galvanized bolt with washer and nut

Hot-dip Galvanized Bolts Details

SIZE: M8-M160

MATEAIL: Carbon Steel

STANDARD: DIN, BS, ANSI, EN, ISO, JIS

GRADE: 8.8, 10.9, 12.9

SURFACE TREATMENT: HDG

CUSTOMIZED SUPPORT: YES

Half Thread Hot-dip Galvanized Bolts GB/T5782 Specifications

    Screw Thread
d
    M1.6
    M2
    M2.5
    M3
    (M3.5)
    M4
    M5
    M6
    M8
    M10
    M12
    (M14)
    M16
    (M18)
    M20
  


    P
    Pitch
    　
    0.35
    0.4
    0.45
    0.5
    0.6
    0.7
    0.8
    1
    1.25
    1.5
    1.75
    2
    2
    2.5
    2.5
  

    b
    L≤125
    　
    9
    10
    11
    12
    13
    14
    16
    18
    22
    26
    30
    34
    38
    42
    46
  

    125＜L≤200
    　
    15
    16
    17
    18
    19
    20
    22
    24
    28
    32
    36
    40
    44
    48
    52
  

    L＞200
    　
    28
    29
    30
    31
    32
    33
    35
    37
    41
    45
    49
    53
    57
    61
    65
  

    c
    max
    　
    0.25
    0.25
    0.25
    0.4
    0.4
    0.4
    0.5
    0.5
    0.6
    0.6
    0.6
    0.6
    0.8
    0.8
    0.8
  

    min
    　
    0.1
    0.1
    0.1
    0.15
    0.15
    0.15
    0.15
    0.15
    0.15
    0.15
    0.15
    0.15
    0.2
    0.2
    0.2
  

    da
    max
    　
    2
    2.6
    3.1
    3.6
    4.1
    4.7
    5.7
    6.8
    9.2
    11.2
    13.7
    15.7
    17.7
    20.2
    22.4
  

    ds
    max=nominal size
    　
    1.6
    2
    2.5
    3
    3.5
    4
    5
    6
    8
    10
    12
    14
    16
    18
    20
  

    Grade A
    min
    1.46
    1.86
    2.36
    2.86
    3.32
    3.82
    4.82
    5.82
    7.78
    9.78
    11.73
    13.73
    15.73
    17.73
    19.67
  

    Grade B
    min
    1.35
    1.75
    2.25
    2.75
    3.2
    3.7
    4.7
    5.7
    7.64
    9.64
    11.57
    13.57
    15.57
    17.57
    19.48
  

    dw
    Grade A
    min
    2.27
    3.07
    4.07
    4.57
    5.07
    5.88
    6.88
    8.88
    11.63
    14.63
    16.63
    19.64
    22.49
    25.34
    28.19
  

    Grade B
    min
    2.3
    2.95
    3.95
    4.45
    4.95
    5.74
    6.74
    8.74
    11.47
    14.47
    16.47
    19.15
    22
    24.85
    27.7
  

    e
    Grade A
    min
    3.41
    4.32
    5.45
    6.01
    6.58
    7.66
    8.79
    11.05
    14.38
    17.77
    20.03
    23.36
    26.75
    30.14
    33.53
  

    Grade B
    min
    3.28
    4.18
    5.31
    5.88
    6.44
    7.5
    8.63
    10.89
    14.2
    17.59
    19.85
    22.78
    26.17
    29.56
    32.95
  

    L1
    max
    　
    0.6
    0.8
    1
    1
    1
    1.2
    1.2
    1.4
    2
    2
    3
    3
    3
    3
    4
  

    k
    Nominal Size
    　
    1.1
    1.4
    1.7
    2
    2.4
    2.8
    3.5
    4
    5.3
    6.4
    7.5
    8.8
    10
    11.5
    12.5
  

    Grade A
    max
    1.225
    1.525
    1.825
    2.125
    2.525
    2.925
    3.65
    4.15
    5.45
    6.58
    7.68
    8.98
    10.18
    11.715
    12.715
  

    min
    0.975
    1.275
    1.575
    1.875
    2.275
    2.675
    3.35
    3.85
    5.15
    6.22
    7.32
    8.62
    9.82
    11.285
    12.285
  

    Grade B
    max
    1.3
    1.6
    1.9
    2.2
    2.6
    3
    3.74
    4.24
    5.54
    6.69
    7.79
    9.09
    10.29
    11.85
    12.85
  

    min
    0.9
    1.2
    1.5
    1.8
    2.2
    2.6
    3.26
    3.76
    5.06
    6.11
    7.21
    8.51
    9.71
    11.15
    12.15
  

    k1
    Grade A
    min
    0.68
    0.89
    1.1
    1.31
    1.59
    1.87
    2.35
    2.7
    3.61
    4.35
    5.12
    6.03
    6.87
    7.9
    8.6
  

    Grade B
    min
    0.63
    0.84
    1.05
    1.26
    1.54
    1.82
    2.28
    2.63
    3.54
    4.28
    5.05
    5.96
    6.8
    7.81
    8.51
  

    r
    min
    　
    0.1
    0.1
    0.1
    0.1
    0.1
    0.2
    0.2
    0.25
    0.4
    0.4
    0.6
    0.6
    0.6
    0.6
    0.8
  

    s
    max=nominal size
    　
    3.2
    4
    5
    5.5
    6
    7
    8
    10
    13
    16
    18
    21
    24
    27
    30
  

    Grade A
    min
    3.02
    3.82
    4.82
    5.32
    5.82
    6.78
    7.78
    9.78
    12.73
    15.73
    17.73
    20.67
    23.67
    26.67
    29.67
  

    Grade B
    min
    2.9
    3.7
    4.7
    5.2
    5.7
    6.64
    7.64
    9.64
    12.57
    15.57
    17.57
    20.16
    23.16
    26.16
    29.16
  

    　                   
  

    Screw   Thread
d
    (M22)
    M24
    (M27)
    M30
    (M33)
    M36
    (M39)
    M42
    (M45)
    M48
    (M52)
    M56
    (M60)
    M64
    　
  

    P
    Pitch
    　
    2.5
    3
    3
    3.5
    3.5
    4
    4
    4.5
    4.5
    5
    5
    5.5
    5.5
    6
    　
  

    b
    L≤125
    　
    50
    54
    60
    66
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    125＜L≤200
    　
    56
    60
    66
    72
    78
    84
    90
    96
    102
    108
    116
    -
    -
    -
    　
  

    L＞200
    　
    69
    73
    79
    85
    91
    97
    103
    109
    115
    121
    129
    137
    145
    153
    　
  

    c
    max
    　
    0.8
    0.8
    0.8
    0.8
    0.8
    0.8
    1
    1
    1
    1
    1
    1
    1
    1
    　
  

    min
    　
    0.2
    0.2
    0.2
    0.2
    0.2
    0.2
    0.3
    0.3
    0.3
    0.3
    0.3
    0.3
    0.3
    0.3
    　
  

    da
    max
    　
    24.4
    26.4
    30.4
    33.4
    36.4
    39.4
    42.4
    45.6
    48.6
    52.6
    56.6
    63
    67
    71
    　
  

    ds
    max=nominal size
    　
    22
    24
    27
    30
    33
    36
    39
    42
    45
    48
    52
    56
    60
    64
    　
  

    Grade A
    min
    21.67
    23.67
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    21.48
    23.48
    26.48
    29.48
    32.38
    35.38
    38.38
    41.38
    44.38
    47.38
    51.26
    55.26
    59.26
    63.26
    　
  

    dw
    Grade A
    min
    31.71
    33.61
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    31.35
    33.25
    38
    42.75
    46.55
    51.11
    55.86
    59.95
    64.7
    69.45
    74.2
    78.66
    83.41
    88.16
    　
  

    e
    Grade A
    min
    37.72
    39.98
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    37.29
    39.55
    45.2
    50.85
    55.37
    60.79
    66.44
    71.3
    76.95
    82.6
    88.25
    93.56
    99.21
    104.86
    　
  

    L1
    max
    　
    4
    4
    6
    6
    6
    6
    6
    8
    8
    10
    10
    12
    12
    13
    　
  

    k
    Nominal Size
    　
    14
    15
    17
    18.7
    21
    22.5
    25
    26
    28
    30
    33
    35
    38
    40
    　
  

    Grade A
    max
    14.215
    15.215
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    min
    13.785
    14.785
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    max
    14.35
    15.35
    17.35
    19.12
    21.42
    22.92
    25.42
    26.42
    28.42
    30.42
    33.5
    35.5
    38.5
    40.5
    　
  

    min
    13.65
    14.65
    16.65
    18.28
    20.58
    22.08
    24.58
    25.58
    27.58
    29.58
    32.5
    34.5
    37.5
    39.5
    　
  

    k1
    Grade A
    min
    9.65
    10.35
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    9.56
    10.26
    11.66
    12.8
    14.41
    15.46
    17.21
    17.91
    19.31
    20.71
    22.75
    24.15
    26.25
    27.65
    　
  

    r
    min
    　
    0.8
    0.8
    1
    1
    1
    1
    1
    1.2
    1.2
    1.6
    1.6
    2
    2
    2
    　
  

    s
    max=nominal size
    　
    34
    36
    41
    46
    50
    55
    60
    65
    70
    75
    80
    85
    90
    95
    　
  

    Grade A
    min
    33.38
    35.38
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    33
    35
    40
    45
    49
    53.8
    58.8
    63.1
    68.1
    73.1
    78.1
    82.8
    87.8
    92.8
    　
  

Screw Thread d	M1.6	M2	M2.5	M3	(M3.5)	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20
P	Pitch		0.35	0.4	0.45	0.5	0.6	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5
b	L≤125		9	10	11	12	13	14	16	18	22	26	30	34	38	42	46
125＜L≤200		15	16	17	18	19	20	22	24	28	32	36	40	44	48	52
L＞200		28	29	30	31	32	33	35	37	41	45	49	53	57	61	65
c	max		0.25	0.25	0.25	0.4	0.4	0.4	0.5	0.5	0.6	0.6	0.6	0.6	0.8	0.8	0.8
min		0.1	0.1	0.1	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.2	0.2	0.2
da	max		2	2.6	3.1	3.6	4.1	4.7	5.7	6.8	9.2	11.2	13.7	15.7	17.7	20.2	22.4
ds	max=nominal size		1.6	2	2.5	3	3.5	4	5	6	8	10	12	14	16	18	20
Grade A	min	1.46	1.86	2.36	2.86	3.32	3.82	4.82	5.82	7.78	9.78	11.73	13.73	15.73	17.73	19.67
Grade B	min	1.35	1.75	2.25	2.75	3.2	3.7	4.7	5.7	7.64	9.64	11.57	13.57	15.57	17.57	19.48
dw	Grade A	min	2.27	3.07	4.07	4.57	5.07	5.88	6.88	8.88	11.63	14.63	16.63	19.64	22.49	25.34	28.19
Grade B	min	2.3	2.95	3.95	4.45	4.95	5.74	6.74	8.74	11.47	14.47	16.47	19.15	22	24.85	27.7
e	Grade A	min	3.41	4.32	5.45	6.01	6.58	7.66	8.79	11.05	14.38	17.77	20.03	23.36	26.75	30.14	33.53
Grade B	min	3.28	4.18	5.31	5.88	6.44	7.5	8.63	10.89	14.2	17.59	19.85	22.78	26.17	29.56	32.95
L1	max		0.6	0.8	1	1	1	1.2	1.2	1.4	2	2	3	3	3	3	4
k	Nominal Size		1.1	1.4	1.7	2	2.4	2.8	3.5	4	5.3	6.4	7.5	8.8	10	11.5	12.5
Grade A	max	1.225	1.525	1.825	2.125	2.525	2.925	3.65	4.15	5.45	6.58	7.68	8.98	10.18	11.715	12.715
min	0.975	1.275	1.575	1.875	2.275	2.675	3.35	3.85	5.15	6.22	7.32	8.62	9.82	11.285	12.285
Grade B	max	1.3	1.6	1.9	2.2	2.6	3	3.74	4.24	5.54	6.69	7.79	9.09	10.29	11.85	12.85
min	0.9	1.2	1.5	1.8	2.2	2.6	3.26	3.76	5.06	6.11	7.21	8.51	9.71	11.15	12.15
k1	Grade A	min	0.68	0.89	1.1	1.31	1.59	1.87	2.35	2.7	3.61	4.35	5.12	6.03	6.87	7.9	8.6
Grade B	min	0.63	0.84	1.05	1.26	1.54	1.82	2.28	2.63	3.54	4.28	5.05	5.96	6.8	7.81	8.51
r	min		0.1	0.1	0.1	0.1	0.1	0.2	0.2	0.25	0.4	0.4	0.6	0.6	0.6	0.6	0.8
s	max=nominal size		3.2	4	5	5.5	6	7	8	10	13	16	18	21	24	27	30
Grade A	min	3.02	3.82	4.82	5.32	5.82	6.78	7.78	9.78	12.73	15.73	17.73	20.67	23.67	26.67	29.67
Grade B	min	2.9	3.7	4.7	5.2	5.7	6.64	7.64	9.64	12.57	15.57	17.57	20.16	23.16	26.16	29.16

Screw Thread d	(M22)	M24	(M27)	M30	(M33)	M36	(M39)	M42	(M45)	M48	(M52)	M56	(M60)	M64
P	Pitch		2.5	3	3	3.5	3.5	4	4	4.5	4.5	5	5	5.5	5.5	6
b	L≤125		50	54	60	66	-	-	-	-	-	-	-	-	-	-
125＜L≤200		56	60	66	72	78	84	90	96	102	108	116	-	-	-
L＞200		69	73	79	85	91	97	103	109	115	121	129	137	145	153
c	max		0.8	0.8	0.8	0.8	0.8	0.8	1	1	1	1	1	1	1	1
min		0.2	0.2	0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3
da	max		24.4	26.4	30.4	33.4	36.4	39.4	42.4	45.6	48.6	52.6	56.6	63	67	71
ds	max=nominal size		22	24	27	30	33	36	39	42	45	48	52	56	60	64
Grade A	min	21.67	23.67	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	21.48	23.48	26.48	29.48	32.38	35.38	38.38	41.38	44.38	47.38	51.26	55.26	59.26	63.26
dw	Grade A	min	31.71	33.61	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	31.35	33.25	38	42.75	46.55	51.11	55.86	59.95	64.7	69.45	74.2	78.66	83.41	88.16
e	Grade A	min	37.72	39.98	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	37.29	39.55	45.2	50.85	55.37	60.79	66.44	71.3	76.95	82.6	88.25	93.56	99.21	104.86
L1	max		4	4	6	6	6	6	6	8	8	10	10	12	12	13
k	Nominal Size		14	15	17	18.7	21	22.5	25	26	28	30	33	35	38	40
Grade A	max	14.215	15.215	-	-	-	-	-	-	-	-	-	-	-	-
min	13.785	14.785	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	max	14.35	15.35	17.35	19.12	21.42	22.92	25.42	26.42	28.42	30.42	33.5	35.5	38.5	40.5
min	13.65	14.65	16.65	18.28	20.58	22.08	24.58	25.58	27.58	29.58	32.5	34.5	37.5	39.5
k1	Grade A	min	9.65	10.35	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	9.56	10.26	11.66	12.8	14.41	15.46	17.21	17.91	19.31	20.71	22.75	24.15	26.25	27.65
r	min		0.8	0.8	1	1	1	1	1	1.2	1.2	1.6	1.6	2	2	2
s	max=nominal size		34	36	41	46	50	55	60	65	70	75	80	85	90	95
Grade A	min	33.38	35.38	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	33	35	40	45	49	53.8	58.8	63.1	68.1	73.1	78.1	82.8	87.8	92.8

Full Thread Hot-dip Galvanized Bolts GB/T5783 Specifications

    Thread Size
d
    M1.6
    M2
    M2.5
    M3
    (M3.5)
    M4
    M5
    M6
    M8
    M10
    M12
    (M14)
    M16
    (M18)
    M20
  


    P
    Pitch
    　
    0.35
    0.4
    0.45
    0.5
    0.6
    0.7
    0.8
    1
    1.25
    1.5
    1.75
    2
    2
    2.5
    2.5
  

    a
    max
    　
    1.05
    1.2
    1.35
    1.5
    1.8
    2.1
    2.4
    3
    4
    4.5
    5.3
    6
    6
    7.5
    7.5
  

    min
    　
    0.35
    0.4
    0.45
    0.5
    0.6
    0.7
    0.8
    1
    1.25
    1.5
    1.75
    2
    2
    2.5
    2.5
  

    c
    max
    　
    0.25
    0.25
    0.25
    0.4
    0.4
    0.4
    0.5
    0.5
    0.6
    0.6
    0.6
    0.6
    0.8
    0.8
    0.8
  

    min
    　
    0.1
    0.1
    0.1
    0.15
    0.15
    0.15
    0.15
    0.15
    0.15
    0.15
    0.15
    0.15
    0.2
    0.2
    0.2
  

    da
    max
    　
    2
    2.6
    3.1
    3.6
    4.1
    4.7
    5.7
    6.8
    9.2
    11.2
    13.7
    15.7
    17.7
    20.2
    22.4
  

    dw
    Grade A
    min
    2.27
    3.07
    4.07
    4.57
    5.07
    5.88
    6.88
    8.88
    11.63
    14.63
    16.63
    19.64
    22.49
    25.34
    28.19
  

    Grade B
    min
    2.3
    2.95
    3.95
    4.45
    4.95
    5.74
    6.74
    8.74
    11.47
    14.47
    16.47
    19.15
    22
    24.85
    27.7
  

    e
    Grade A
    min
    3.41
    4.32
    5.45
    6.01
    6.58
    7.66
    8.79
    11.05
    14.38
    17.77
    20.03
    23.36
    26.75
    30.14
    33.53
  

    Grade B
    min
    3.28
    4.18
    5.31
    5.88
    6.44
    7.5
    8.63
    10.89
    14.2
    17.59
    19.85
    22.78
    26.17
    29.56
    32.95
  

    k
    Nominal Size
    　
    1.1
    1.4
    1.7
    2
    2.4
    2.8
    3.5
    4
    5.3
    6.4
    7.5
    8.8
    10
    11.5
    12.5
  

    Grade A
    max
    1.225
    1.525
    1.825
    2.125
    2.525
    2.925
    3.65
    4.15
    5.45
    6.58
    7.68
    8.98
    10.18
    11.715
    12.715
  

    min
    0.975
    1.275
    1.575
    1.875
    2.275
    2.675
    3.35
    3.85
    5.15
    6.22
    7.32
    8.62
    9.82
    11.285
    12.285
  

    Grade B
    max
    1.3
    1.6
    1.9
    2.2
    2.6
    3
    3.74
    4.24
    5.54
    6.69
    7.79
    9.09
    10.29
    11.85
    12.85
  

    min
    0.9
    1.2
    1.5
    1.8
    2.2
    2.6
    3.26
    3.76
    5.06
    6.11
    7.21
    8.51
    9.71
    11.15
    12.15
  

    k1
    Grade A
    min
    0.68
    0.89
    1.1
    1.31
    1.59
    1.87
    2.35
    2.7
    3.61
    4.35
    5.12
    6.03
    6.87
    7.9
    8.6
  

    Grade B
    min
    0.63
    0.84
    1.05
    1.26
    1.54
    1.82
    2.28
    2.63
    3.54
    4.28
    5.05
    5.96
    6.8
    7.81
    8.51
  

    r
    min
    　
    0.1
    0.1
    0.1
    0.1
    0.1
    0.2
    0.2
    0.25
    0.4
    0.4
    0.6
    0.6
    0.6
    0.6
    0.8
  

    s
    max=nominal size
    　
    3.2
    4
    5
    5.5
    6
    7
    8
    10
    13
    16
    18
    21
    24
    27
    30
  

    Grade A
    min
    3.02
    3.82
    4.82
    5.32
    5.82
    6.78
    7.78
    9.78
    12.73
    15.73
    17.73
    20.67
    23.67
    26.67
    29.67
  

    Grade B
    min
    2.9
    3.7
    4.7
    5.2
    5.7
    6.64
    7.64
    9.64
    12.57
    15.57
    17.57
    20.16
    23.16
    26.16
    29.16
  

    　                   
  

       Thread   Size
d
    (M22)
    M24
    (M27)
    M30
    (M33)
    M36
    (M39)
    M42
    (M45)
    M48
    (M52)
    M56
    (M60)
    M64
    　
  

    P
    Pitch
    　
    2.5
    3
    3
    3.5
    3.5
    4
    4
    4.5
    4.5
    5
    5
    5.5
    5.5
    6
    　
  

    a
    max
    　
    7.5
    9
    9
    10.5
    10.5
    12
    12
    13.5
    13.5
    15
    15
    16.5
    16.5
    18
    　
  

    min
    　
    2.5
    3
    3
    3.5
    3.5
    4
    4
    4.5
    4.5
    5
    5
    5.5
    5.5
    6
    　
  

    c
    max
    　
    0.8
    0.8
    0.8
    0.8
    0.8
    0.8
    1
    1
    1
    1
    1
    1
    1
    1
    　
  

    min
    　
    0.2
    0.2
    0.2
    0.2
    0.2
    0.2
    0.3
    0.3
    0.3
    0.3
    0.3
    0.3
    0.3
    0.3
    　
  

    da
    max
    　
    24.4
    26.4
    30.4
    33.4
    36.4
    39.4
    42.4
    45.6
    48.6
    52.6
    56.6
    63
    67
    71
    　
  

    dw
    Grade A
    min
    31.71
    33.61
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    31.35
    33.25
    38
    42.75
    46.55
    51.11
    55.86
    59.95
    64.7
    69.45
    74.2
    78.66
    83.41
    88.16
    　
  

    e
    Grade A
    min
    37.72
    39.98
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    37.29
    39.55
    45.2
    50.85
    55.37
    60.79
    66.44
    71.3
    76.95
    82.6
    88.25
    93.56
    99.21
    104.86
    　
  

    k
    Nominal Size
    　
    14
    15
    17
    18.7
    21
    22.5
    25
    26
    28
    30
    33
    35
    38
    40
    　
  

    Grade A
    max
    14.215
    15.215
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    min
    13.785
    14.785
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    max
    14.35
    15.35
    17.35
    19.12
    21.42
    22.92
    25.42
    26.42
    28.42
    30.42
    33.5
    35.5
    38.5
    40.5
    　
  

    min
    13.65
    14.65
    16.65
    18.28
    20.58
    22.08
    24.58
    25.58
    27.58
    29.58
    32.5
    34.5
    37.5
    39.5
    　
  

    k1
    Grade A
    min
    9.65
    10.35
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    9.56
    10.26
    11.66
    12.8
    14.41
    15.46
    17.21
    17.91
    19.31
    20.71
    22.75
    24.15
    26.25
    27.65
    　
  

    r
    min
    　
    0.8
    0.8
    1
    1
    1
    1
    1
    1.2
    1.2
    1.6
    1.6
    2
    2
    2
    　
  

    s
    max=nominal size
    　
    34
    36
    41
    46
    50
    55
    60
    65
    70
    75
    80
    85
    90
    95
    　
  

    Grade A
    min
    33.38
    35.38
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    -
    　
  

    Grade B
    min
    33
    35
    40
    45
    49
    53.8
    58.8
    63.1
    68.1
    73.1
    78.1
    82.8
    87.8
    92.8
    　
  

Thread Size d	M1.6	M2	M2.5	M3	(M3.5)	M4	M5	M6	M8	M10	M12	(M14)	M16	(M18)	M20
P	Pitch		0.35	0.4	0.45	0.5	0.6	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5
a	max		1.05	1.2	1.35	1.5	1.8	2.1	2.4	3	4	4.5	5.3	6	6	7.5	7.5
min		0.35	0.4	0.45	0.5	0.6	0.7	0.8	1	1.25	1.5	1.75	2	2	2.5	2.5
c	max		0.25	0.25	0.25	0.4	0.4	0.4	0.5	0.5	0.6	0.6	0.6	0.6	0.8	0.8	0.8
min		0.1	0.1	0.1	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.15	0.2	0.2	0.2
da	max		2	2.6	3.1	3.6	4.1	4.7	5.7	6.8	9.2	11.2	13.7	15.7	17.7	20.2	22.4
dw	Grade A	min	2.27	3.07	4.07	4.57	5.07	5.88	6.88	8.88	11.63	14.63	16.63	19.64	22.49	25.34	28.19
Grade B	min	2.3	2.95	3.95	4.45	4.95	5.74	6.74	8.74	11.47	14.47	16.47	19.15	22	24.85	27.7
e	Grade A	min	3.41	4.32	5.45	6.01	6.58	7.66	8.79	11.05	14.38	17.77	20.03	23.36	26.75	30.14	33.53
Grade B	min	3.28	4.18	5.31	5.88	6.44	7.5	8.63	10.89	14.2	17.59	19.85	22.78	26.17	29.56	32.95
k	Nominal Size		1.1	1.4	1.7	2	2.4	2.8	3.5	4	5.3	6.4	7.5	8.8	10	11.5	12.5
Grade A	max	1.225	1.525	1.825	2.125	2.525	2.925	3.65	4.15	5.45	6.58	7.68	8.98	10.18	11.715	12.715
min	0.975	1.275	1.575	1.875	2.275	2.675	3.35	3.85	5.15	6.22	7.32	8.62	9.82	11.285	12.285
Grade B	max	1.3	1.6	1.9	2.2	2.6	3	3.74	4.24	5.54	6.69	7.79	9.09	10.29	11.85	12.85
min	0.9	1.2	1.5	1.8	2.2	2.6	3.26	3.76	5.06	6.11	7.21	8.51	9.71	11.15	12.15
k1	Grade A	min	0.68	0.89	1.1	1.31	1.59	1.87	2.35	2.7	3.61	4.35	5.12	6.03	6.87	7.9	8.6
Grade B	min	0.63	0.84	1.05	1.26	1.54	1.82	2.28	2.63	3.54	4.28	5.05	5.96	6.8	7.81	8.51
r	min		0.1	0.1	0.1	0.1	0.1	0.2	0.2	0.25	0.4	0.4	0.6	0.6	0.6	0.6	0.8
s	max=nominal size		3.2	4	5	5.5	6	7	8	10	13	16	18	21	24	27	30
Grade A	min	3.02	3.82	4.82	5.32	5.82	6.78	7.78	9.78	12.73	15.73	17.73	20.67	23.67	26.67	29.67
Grade B	min	2.9	3.7	4.7	5.2	5.7	6.64	7.64	9.64	12.57	15.57	17.57	20.16	23.16	26.16	29.16

Thread Size d	(M22)	M24	(M27)	M30	(M33)	M36	(M39)	M42	(M45)	M48	(M52)	M56	(M60)	M64
P	Pitch		2.5	3	3	3.5	3.5	4	4	4.5	4.5	5	5	5.5	5.5	6
a	max		7.5	9	9	10.5	10.5	12	12	13.5	13.5	15	15	16.5	16.5	18
min		2.5	3	3	3.5	3.5	4	4	4.5	4.5	5	5	5.5	5.5	6
c	max		0.8	0.8	0.8	0.8	0.8	0.8	1	1	1	1	1	1	1	1
min		0.2	0.2	0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.3	0.3	0.3	0.3
da	max		24.4	26.4	30.4	33.4	36.4	39.4	42.4	45.6	48.6	52.6	56.6	63	67	71
dw	Grade A	min	31.71	33.61	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	31.35	33.25	38	42.75	46.55	51.11	55.86	59.95	64.7	69.45	74.2	78.66	83.41	88.16
e	Grade A	min	37.72	39.98	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	37.29	39.55	45.2	50.85	55.37	60.79	66.44	71.3	76.95	82.6	88.25	93.56	99.21	104.86
k	Nominal Size		14	15	17	18.7	21	22.5	25	26	28	30	33	35	38	40
Grade A	max	14.215	15.215	-	-	-	-	-	-	-	-	-	-	-	-
min	13.785	14.785	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	max	14.35	15.35	17.35	19.12	21.42	22.92	25.42	26.42	28.42	30.42	33.5	35.5	38.5	40.5
min	13.65	14.65	16.65	18.28	20.58	22.08	24.58	25.58	27.58	29.58	32.5	34.5	37.5	39.5
k1	Grade A	min	9.65	10.35	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	9.56	10.26	11.66	12.8	14.41	15.46	17.21	17.91	19.31	20.71	22.75	24.15	26.25	27.65
r	min		0.8	0.8	1	1	1	1	1	1.2	1.2	1.6	1.6	2	2	2
s	max=nominal size		34	36	41	46	50	55	60	65	70	75	80	85	90	95
Grade A	min	33.38	35.38	-	-	-	-	-	-	-	-	-	-	-	-
Grade B	min	33	35	40	45	49	53.8	58.8	63.1	68.1	73.1	78.1	82.8	87.8	92.8

Product FAQs

What are the uses for hot-dip galvanized bolts?

Hot-dip galvanized bolts have the advantages of corrosion resistance, wear resistance and high strength. Here are some of its common uses:

1. Construction industry: Hot-dip galvanized bolts are often used in building structures, such as connecting steel structures, beams, columns, etc. Hot-dip galvanized bolts enhance the structural stability and durability of your building by providing reliable connections and long-term resistance to corrosion in outdoor environments.

2. Outdoor facilities and landscaping: In outdoor environments, metal components are susceptible to atmospheric moisture, rain and other natural elements. Therefore, Hot-dip galvanized bolts are often used in various outdoor facilities such as landscaping, outdoor furniture, fences, doors and windows to extend their service life.

3. Bridge and road engineering: In bridge and road engineering, Hot-dip galvanized bolts are used to connect various components, such as bridge beam sections, guardrails, road signs, etc. Hot-dip galvanized bolts are able to withstand high strength and critical loads while resisting corrosion and damage from the environment.

4. Marine and coastal engineering: Due to the large amount of salt in seawater and the humid environment, metal components are susceptible to corrosion. Hot-dip galvanized bolts are widely used in marine and coastal engineering to join structures such as piers, offshore platforms, ships and breakwaters to provide additional protection against corrosion.

Hot-dip galvanized bolts play an important role in many fields, and their corrosion resistance and high strength make them an indispensable component in many engineering projects.

What are the commonly used materials and specifications of hot-dip galvanized bolts?

Hot-dip galvanized bolts are usually made of carbon steel or alloy steel, both of which have good mechanical properties and corrosion resistance and are well suited for galvanizing. Common specifications include:

Diameter: Usually measured in inches or millimeters. Common diameters range from 1/4 inch to 1 inch (6mm to 25mm), and bolts for different uses may have different diameters.

Length: Length is usually measured in inches or millimeters (mm). The length depends on the specific use and installation requirements of the hot-dip galvanized bolts and can be customized as needed.

Thread Specification: The thread specification of hot-dip galvanized bolts is usually measured in inches or millimeters (mm). Common thread specifications include UNC (Unified National Coarse), UNF (Unified National Fine), Metric, etc.

Strength grade (Grade): The strength grade of hot-dip galvanized bolts varies according to their materials and manufacturing processes. Common strength levels include 8.8, 10.9, 12.9, etc.

Head Type: Common head types of hot-dip galvanized bolts include Hex Head, Round Head, Flat Head, etc. Choose the appropriate head type according to the specific use.

The specifications and material selection of hot-dip galvanized bolts depend on their specific use and installation environment. When selecting hot-dip galvanized bolts, factors such as load requirements, environmental conditions, installation methods, etc. need to be considered to ensure that the selected hot-dip galvanized bolts can meet the needs of the project.

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