Hex Flange Bolt DIN6921 High Strength Galvanized Carbon Steel Stainless Steel Best Quality China Manufacturer

Hex flange bolt Introduction

Hex flange bolts are a common fastener often used to join two or more parts. Their name comes from the design of their heads, which are hexagonal in shape.

Hex flange bolts are widely used in various fields, including machinery manufacturing, construction engineering, automobile manufacturing, aerospace, etc. Hex flange bolt are used to connect mechanical parts, structural frames, equipment, pipes, etc. to provide strong connections.

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Two hex flange bolts made of stainless steel

Hex flange bolt Details

SIZE: M5-M20

MATEAIL: Carbon Steel, Stainless Steel

GRADE: 4.8, 8.8, 10.9, 12.9

STANDARD: DIN 6921, ISO 4162, EN 1665

SURFACE TREATMENT: ZP, HDG, BLACK, Dacromet

CUSTOMIZED SUPPORT: YES

DIN 6921 Hex Flange Bolt Specifications

Screw Thread
dM5M6M8M10M12M14M16M20
PPitchCoarse thread0.811.251.51.75222.5
Fine thread-1//11.251.51.51.51.5
Fine thread-2///11.25///
bL≤125　1618222630343846
125＜L≤200　//283236404452
L＞200　//////5765
cmin　11.11.21.51.82.12.43
daForm Amax5.76.89.211.213.715.717.722.4
Form Bmax6.27.41012.615.217.720.725.7
dcmax　11.814.21822.326.630.53543
dsmax　5681012141620
min　4.825.827.789.7811.7313.7315.7319.67
dumax　5.56.691113.515.517.522
dwmin　9.812.215.819.623.827.631.939.9
emin　8.7110.9514.2616.517.6219.8623.1529.87
fmax　1.42223334
kmax　5.46.68.19.211.512.814.417.1
k1min　22.53.23.64.65.15.86.8
r1min　0.250.40.40.40.60.60.60.8
r2max　0.30.40.50.60.70.911.2
r3min　0.10.10.150.20.250.30.350.4
r4≈　33.44.34.36.46.46.48.5
smax=nominal size　810131516182127
min　7.789.7812.7314.7315.7317.7320.6726.67
tmax　0.150.20.250.30.350.450.50.65
min　0.050.050.10.150.150.20.250.3

Screw Thread d	M5	M6	M8	M10	M12	M14	M16	M20
P	Pitch	Coarse thread	0.8	1	1.25	1.5	1.75	2	2	2.5
Fine thread-1	/	/	1	1.25	1.5	1.5	1.5	1.5
Fine thread-2	/	/	/	1	1.25	/	/	/
b	L≤125		16	18	22	26	30	34	38	46
125＜L≤200		/	/	28	32	36	40	44	52
L＞200		/	/	/	/	/	/	57	65
c	min		1	1.1	1.2	1.5	1.8	2.1	2.4	3
da	Form A	max	5.7	6.8	9.2	11.2	13.7	15.7	17.7	22.4
Form B	max	6.2	7.4	10	12.6	15.2	17.7	20.7	25.7
dc	max		11.8	14.2	18	22.3	26.6	30.5	35	43
ds	max		5	6	8	10	12	14	16	20
min		4.82	5.82	7.78	9.78	11.73	13.73	15.73	19.67
du	max		5.5	6.6	9	11	13.5	15.5	17.5	22
dw	min		9.8	12.2	15.8	19.6	23.8	27.6	31.9	39.9
e	min		8.71	10.95	14.26	16.5	17.62	19.86	23.15	29.87
f	max		1.4	2	2	2	3	3	3	4
k	max		5.4	6.6	8.1	9.2	11.5	12.8	14.4	17.1
k1	min		2	2.5	3.2	3.6	4.6	5.1	5.8	6.8
r1	min		0.25	0.4	0.4	0.4	0.6	0.6	0.6	0.8
r2	max		0.3	0.4	0.5	0.6	0.7	0.9	1	1.2
r3	min		0.1	0.1	0.15	0.2	0.25	0.3	0.35	0.4
r4	≈		3	3.4	4.3	4.3	6.4	6.4	6.4	8.5
s	max=nominal size		8	10	13	15	16	18	21	27
min		7.78	9.78	12.73	14.73	15.73	17.73	20.67	26.67
t	max		0.15	0.2	0.25	0.3	0.35	0.45	0.5	0.65
min		0.05	0.05	0.1	0.15	0.15	0.2	0.25	0.3

Equivalent Standard

DIN EN 1665 Hex flange bolt ( Heavy Series )

Thread Size
     dM5M6M8M10M12(M14)M16M20
PPitch0.811.251.51.75222.5
bL≤1251618222630343846
125＜L≤200//283236404452
L＞200//////5765
dcmax11.814.21822.326.630.53543
dsmax5681012141620
min4.825.827.789.7811.7313.7315.7319.67
emin8.7110.9514.2617.6219.8623.1526.5133.23
kmax5.86.68.110.411.813.715.418.9
smax810131618212430
min7.789.7812.7315.7317.7320.6723.6729.67
cmin11.11.21.51.82.12.43

Thread Size d	M5	M6	M8	M10	M12	(M14)	M16	M20
P	Pitch	0.8	1	1.25	1.5	1.75	2	2	2.5
b	L≤125	16	18	22	26	30	34	38	46
125＜L≤200	/	/	28	32	36	40	44	52
L＞200	/	/	/	/	/	/	57	65
dc	max	11.8	14.2	18	22.3	26.6	30.5	35	43
ds	max	5	6	8	10	12	14	16	20
min	4.82	5.82	7.78	9.78	11.73	13.73	15.73	19.67
e	min	8.71	10.95	14.26	17.62	19.86	23.15	26.51	33.23
k	max	5.8	6.6	8.1	10.4	11.8	13.7	15.4	18.9
s	max	8	10	13	16	18	21	24	30
min	7.78	9.78	12.73	15.73	17.73	20.67	23.67	29.67
c	min	1	1.1	1.2	1.5	1.8	2.1	2.4	3

Equivalent Standard

ISO 4162 Hex flange bolt ( Small Series )

Screw Thread
     dM5M6M8M10M12(M14)M16
PPitch　0.811.251.51.7522
bL≤125　16182226303438
125＜L≤200　//2832364044
L＞200　//////57
dcmax　11.413.61720.824.728.632.8
dsmax　56810121416
min　4.825.827.789.7811.7313.7315.73
emin　7.448.5610.814.0816.3219.6822.58
kmax　5.66.88.59.711.912.915.1
smax　781013151821
min　6.647.649.6412.5714.5717.5720.16
cmin　11.11.21.51.82.12.4
damaxType F5.76.89.211.213.715.717.7
Type U6.27.51012.515.217.720.5
dumax　5.56.68.810.812.814.817.2
dwmin　9.411.614.918.722.526.430.6
k1min　2.32.93.84.35.45.66.7
fmax　1.41.62.12.12.12.13.2
r1min　0.20.250.40.40.60.60.6
r2 ①max　0.30.40.50.60.70.91
r3max　0.250.260.360.450.540.630.72
min　0.10.110.160.20.240.280.32
r4Ref.　44.45.75.75.75.78.8
Vmax　0.150.20.250.30.350.450.5
min　0.050.050.10.150.150.20.25

Screw Thread d	M5	M6	M8	M10	M12	(M14)	M16
P	Pitch		0.8	1	1.25	1.5	1.75	2	2
b	L≤125		16	18	22	26	30	34	38
125＜L≤200		/	/	28	32	36	40	44
L＞200		/	/	/	/	/	/	57
dc	max		11.4	13.6	17	20.8	24.7	28.6	32.8
ds	max		5	6	8	10	12	14	16
min		4.82	5.82	7.78	9.78	11.73	13.73	15.73
e	min		7.44	8.56	10.8	14.08	16.32	19.68	22.58
k	max		5.6	6.8	8.5	9.7	11.9	12.9	15.1
s	max		7	8	10	13	15	18	21
min		6.64	7.64	9.64	12.57	14.57	17.57	20.16
c	min		1	1.1	1.2	1.5	1.8	2.1	2.4
da	max	Type F	5.7	6.8	9.2	11.2	13.7	15.7	17.7
Type U	6.2	7.5	10	12.5	15.2	17.7	20.5
du	max		5.5	6.6	8.8	10.8	12.8	14.8	17.2
dw	min		9.4	11.6	14.9	18.7	22.5	26.4	30.6
k1	min		2.3	2.9	3.8	4.3	5.4	5.6	6.7
f	max		1.4	1.6	2.1	2.1	2.1	2.1	3.2
r1	min		0.2	0.25	0.4	0.4	0.6	0.6	0.6
r2 ①	max		0.3	0.4	0.5	0.6	0.7	0.9	1
r3	max		0.25	0.26	0.36	0.45	0.54	0.63	0.72
min		0.1	0.11	0.16	0.2	0.24	0.28	0.32
r4	Ref.		4	4.4	5.7	5.7	5.7	5.7	8.8
V	max		0.15	0.2	0.25	0.3	0.35	0.45	0.5
min		0.05	0.05	0.1	0.15	0.15	0.2	0.25

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