DIN 25201 Double Fold Self-locking Washers
DIN 25201 Wedge lock washer is one of the German standard washers. DIN 25201 Wedge lock washer consists of a set of two identical washers, each with different serrations on the front and back of the washer.
Wedge lock washers DIN 25201 has a high security performance. DIN 25201 Wedge lock washer provides a secure bolt locking system that is not affected by any vibration or dynamic loads.
Wedge lock washers DIN 25201 has a high security performance. DIN 25201 Wedge lock washer provides a secure bolt locking system that is not affected by any vibration or dynamic loads.
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DIN 25201 Double Fold Self-locking Washer Details
SIZE: M3-M130
MATEAIL: Carbon Steel
STANDARD: DIN25201
GRADE: /
SURFACE TREATMENT: ZP, HDG, BLACK, Dacromet
CUSTOMIZED SUPPORT: YES
DIN 25201 Double Fold Self-locking Washer Specifications
| Size | 3 | 3.5 | 3.5 | 4 | 4 | 5 | 5 | 6 | 6 | 1/4 | 1/4 | 8 | 8 | 3/8 | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Large | Large | Large | Large | Large | Large | |||||||||||||
| Bolt size | Metric | M3 | M3.5 | M3.5 | M4 | M4 | M5 | M5 | M6 | M6 | - | - | M8 | M8 | - | |||
| Inch | #5 | #6 | #6 | #8 | #8 | #10 | #10 | - | - | 1/4” | 1/4” | 5/16” | 5/16” | 3/8” | ||||
| d | max | 3.5 | 4 | 4 | 4.5 | 4.5 | 5.5 | 5.5 | 6.6 | 6.6 | 7.3 | 7.3 | 8.8 | 8.8 | 10.5 | |||
| min | 3.3 | 3.8 | 3.8 | 4.3 | 4.3 | 5.3 | 5.3 | 6.4 | 6.4 | 7.1 | 7.1 | 8.6 | 8.6 | 10.1 | ||||
| dc | Nominal Size | 7 | 7.6 | 9 | 7.6 | 9 | 9 | 10.8 | 10.8 | 13.5 | 11.5 | 13.5 | 13.5 | 16.6 | 16.6 | |||
| max | 7.2 | 7.8 | 9.2 | 7.8 | 9.2 | 9.2 | 11 | 11 | 13.7 | 11.7 | 13.7 | 13.7 | 16.8 | 16.8 | ||||
| min | 6.8 | 7.4 | 8.8 | 7.4 | 8.8 | 8.8 | 10.6 | 10.6 | 13.3 | 11.3 | 13.3 | 13.3 | 16.4 | 16.4 | ||||
| h | Steel | Nominal Size | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 1.8 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | ||
| max | 2.05 | 2.05 | 2.05 | 2.05 | 2.05 | 2.05 | 2.05 | 2.05 | 2.75 | 2.75 | 2.75 | 2.75 | 2.75 | 2.75 | ||||
| min | 1.55 | 1.55 | 1.55 | 1.55 | 1.55 | 1.55 | 1.55 | 1.55 | 2.25 | 2.25 | 2.25 | 2.25 | 2.25 | 2.25 | ||||
| per 1000 units≈kg | Steel | ≈ | 0.3 | 0.4 | 0.6 | 0.4 | 0.6 | 0.5 | 1.1 | 0.7 | 2 | 0.8 | 1.8 | 1.5 | 2.8 | 2.3 | ||
| h | Stainless Steel | Nominal Size | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2.2 | 2 | 2.2 | 2.2 | 2 | 2 | 2 | ||
| max | 2.45 | 2.45 | 2.45 | 2.45 | 2.45 | 2.45 | 2.45 | 2.45 | 2.25 | 2.45 | 2.45 | 2.25 | 2.25 | 2.25 | ||||
| min | 1.95 | 1.95 | 1.95 | 1.95 | 1.95 | 1.95 | 1.95 | 1.95 | 1.75 | 1.95 | 1.95 | 1.75 | 1.75 | 1.75 | ||||
| per 1000 units≈kg | Stainless Steel | ≈ | 0.4 | 0.4 | 0.7 | 0.4 | 0.7 | 0.6 | 1.1 | 0.9 | 1.6 | 0.9 | 1.5 | 1.2 | 2.3 | 1.9 | ||
| Size | 3/8 | 10 | 10 | 11 | 12 | 12 | 1/2 | 1/2 | 14 | 14 | 16 | 16 | 18 | 18 | ||||
| Large | Large | Large | Large | Large | Large | Large | ||||||||||||
| Bolt size | Metric | - | M10 | M10 | M11 | M12 | M12 | - | - | M14 | M14 | M16 | M16 | M18 | M18 | |||
| Inch | 3/8” | - | - | 7/16” | - | - | 1/2” | 1/2” | 9/16” | 9/16” | 5/8” | 5/8” | - | - | ||||
| d | max | 10.5 | 10.9 | 10.9 | 11.6 | 13.2 | 13.2 | 13.7 | 13.7 | 15.4 | 15.4 | 17.2 | 17.2 | 19.7 | 19.7 | |||
| min | 10.1 | 10.5 | 10.5 | 11.2 | 12.8 | 12.8 | 13.3 | 13.3 | 15 | 15 | 16.8 | 16.8 | 19.3 | 19.3 | ||||
| dc | Nominal Size | 21 | 16.6 | 21 | 18.5 | 19.5 | 25.4 | 19.5 | 25.4 | 23 | 30.7 | 25.4 | 30.7 | 29 | 34.5 | |||
| max | 21.2 | 16.8 | 21.2 | 18.7 | 19.7 | 25.6 | 19.7 | 25.6 | 23.2 | 30.9 | 25.6 | 30.9 | 29.2 | 34.7 | ||||
| min | 20.8 | 16.4 | 20.8 | 18.3 | 19.3 | 25.2 | 19.3 | 25.2 | 22.8 | 30.5 | 25.2 | 30.5 | 28.8 | 34.3 | ||||
| h | Steel | Nominal Size | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 3.4 | 2.5 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | ||
| max | 2.75 | 2.75 | 2.75 | 2.75 | 2.75 | 3.65 | 2.75 | 3.65 | 3.65 | 3.65 | 3.65 | 3.65 | 3.65 | 3.65 | ||||
| min | 2.25 | 2.25 | 2.25 | 2.25 | 2.25 | 3.15 | 2.25 | 3.15 | 3.15 | 3.15 | 3.15 | 3.15 | 3.15 | 3.15 | ||||
| per 1000 units≈kg | Steel | ≈ | 4.8 | 2.2 | 4.7 | 2.9 | 2.9 | 9.3 | 2.7 | 9 | 5.6 | 14.1 | 6.7 | 12.8 | 8.9 | 15.8 | ||
| h | Stainless Steel | Nominal Size | 2 | 2 | 2 | 2.2 | 2 | 3 | 2 | 3.2 | 3 | 3.2 | 3 | 3.2 | 3.2 | 3.2 | ||
| max | 2.25 | 2.25 | 2.25 | 2.45 | 2.25 | 3.25 | 2.25 | 3.45 | 3.25 | 3.45 | 3.25 | 3.45 | 3.45 | 3.45 | ||||
| min | 1.75 | 1.75 | 1.75 | 1.95 | 1.75 | 2.75 | 1.75 | 2.95 | 2.75 | 2.95 | 2.75 | 2.95 | 2.95 | 2.95 | ||||
| per 1000 units≈kg | Stainless Steel | ≈ | 3.8 | 1.8 | 3.7 | 2.6 | 2.3 | 8.2 | 2.2 | 8 | 4.9 | 13.1 | 5.9 | 11.3 | 8 | 15.6 | ||
| Size | 3/4 | 3/4 | 20 | 20 | 22 | 22 | 24 | 24 | 1 | 1 | 27 | 27 | 30 | 30 | ||||
| Large | Large | Large | Large | Large | Large | Large | ||||||||||||
| Bolt size | Metric | - | - | M20 | M20 | M22 | M22 | M24 | M24 | - | - | M27 | M27 | M30 | M30 | |||
| Inch | 3/4” | 3/4” | - | - | 7/8” | 7/8” | - | - | 1” | 1” | - | - | 1 1/8” | 1 1/8” | ||||
| d | max | 20.2 | 20.2 | 21.6 | 21.6 | 23.6 | 23.6 | 25.5 | 25.5 | 28.1 | 28.1 | 28.6 | 28.6 | 31.6 | 31.6 | |||
| min | 19.8 | 19.8 | 21.2 | 21.2 | 23.2 | 23.2 | 25.1 | 25.1 | 27.7 | 27.7 | 28.2 | 28.2 | 31.2 | 31.2 | ||||
| dc | Nominal Size | 30.7 | 39 | 30.7 | 39 | 34.5 | 42 | 39 | 48.5 | 39 | 48.5 | 42 | 48.5 | 47 | 58.5 | |||
| max | 30.9 | 39.2 | 30.9 | 39.2 | 34.7 | 42.2 | 39.2 | 48.7 | 39.3 | 48.8 | 42.3 | 48.8 | 47.3 | 58.8 | ||||
| min | 30.5 | 38.8 | 30.5 | 38.8 | 34.3 | 41.8 | 38.8 | 48.3 | 38.7 | 48.2 | 41.7 | 48.2 | 46.7 | 58.2 | ||||
| h | Steel | Nominal Size | 3.4 | 3.4 | 3.4 | 3.4 | 3.4 | 4.6 | 3.4 | 4.6 | 3.4 | 4.6 | 5.8 | 5.8 | 5.8 | 6.6 | ||
| max | 3.65 | 3.65 | 3.65 | 3.65 | 3.65 | 4.85 | 3.65 | 4.85 | 3.65 | 4.85 | 6.05 | 6.05 | 6.05 | 6.6 | ||||
| min | 3.15 | 3.15 | 3.15 | 3.15 | 3.15 | 4.35 | 3.15 | 4.35 | 3.15 | 4.35 | 5.55 | 5.55 | 5.55 | 6.1 | ||||
| per 1000 units≈kg | Steel | ≈ | 10.5 | 22.1 | 9.3 | 20.9 | 12.5 | 31.9 | 17.4 | 45.1 | 15.3 | 42 | 31.4 | 52.7 | 41 | 85.8 | ||
| h | Stainless Steel | Nominal Size | 3.2 | 3.2 | 3 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 3.2 | 6.8 | 6.8 | 6.8 | 6.8 | ||
| max | 3.45 | 3.45 | 3.25 | 3.45 | 3.45 | 3.45 | 3.45 | 3.45 | 3.2 | 3.2 | 6.8 | 6.8 | 6.8 | 6.8 | ||||
| min | 2.95 | 2.95 | 2.75 | 2.95 | 2.95 | 2.95 | 2.95 | 2.95 | 2.7 | 2.7 | 6.3 | 6.3 | 6.3 | 6.3 | ||||
| per 1000 units≈kg | Stainless Steel | ≈ | 9.6 | 21 | 8.2 | 20.6 | 12.3 | 22.2 | 15.9 | 35 | 14.2 | 27.9 | 34.5 | 53.4 | 44.9 | 91.8 | ||
| Size | 33 | 33 | 36 | 36 | 39 | 42 | 45 | 48 | 52 | 56 | 60 | 64 | 68 | 72 | ||||
| Large | Large | |||||||||||||||||
| Bolt size | Metric | M33 | M33 | M36 | M36 | M39 | M42 | M45 | M48 | M52 | M56 | M60 | M64 | M68 | M72 | |||
| Inch | 1 1/4” | 1 1/4” | 1 3/8” | 1 3/8” | 1 1/2” | - | 1 3/4” | - | 2” | 2 1/4” | - | 2 1/2” | - | - | ||||
| d | max | 34.6 | 34.6 | 37.6 | 37.6 | 40.6 | 43.4 | 46.7 | 50.1 | 54.1 | 59.6 | 63.6 | 67.6 | 71.6 | 75.6 | |||
| min | 34.2 | 34.2 | 37.2 | 37.2 | 40.2 | 43 | 46.2 | 49.6 | 53.6 | 59.1 | 63.1 | 67.1 | 71.1 | 75.1 | ||||
| dc | Nominal Size | 48.5 | 58.5 | 55 | 63 | 58.5 | 63 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | |||
| max | 48.8 | 58.8 | 55.3 | 63.3 | 58.8 | 63.3 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | ||||
| min | 48.2 | 58.2 | 54.7 | 62.7 | 58.2 | 62.7 | 68 | 73 | 78 | 83 | 88 | 93 | 98 | 103 | ||||
| h | Steel | Nominal Size | 5.8 | 6.6 | 5.8 | 6.6 | 5.8 | 5.8 | 7 | 7 | 7 | 7 | 7 | 7 | 9.5 | 9.5 | ||
| max | 6.05 | 6.6 | 6.05 | 6.6 | 6.05 | 6.05 | 7.75 | 7.75 | 7.75 | 7.75 | 7.75 | 7.75 | 10.25 | 10.25 | ||||
| min | 5.55 | 6.1 | 5.55 | 6.1 | 5.55 | 5.55 | 6.25 | 6.25 | 6.25 | 6.25 | 6.25 | 6.25 | 8.75 | 8.75 | ||||
| per 1000 units≈kg | Steel | ≈ | 38.9 | 80 | 54.9 | 91.5 | 58.9 | 79.7 | 102 | 120 | 130 | 135 | 152 | 167 | 282 | 307 | ||
| h | Stainless Steel | Nominal Size | 6.8 | / | 6.8 | / | 6.8 | 6.8 | 6.8 | 6.8 | 9 | 9 | 9 | 9 | 9 | 9 | ||
| max | 6.8 | / | 6.8 | / | 6.8 | 6.8 | 7.55 | 7.55 | 9.75 | 9.75 | 9.75 | 9.75 | 9.75 | 9.75 | ||||
| min | 6.3 | / | 6.3 | / | 6.3 | 6.3 | 6.05 | 6.05 | 8.25 | 8.25 | 8.25 | 8.25 | 8.25 | 8.25 | ||||
| per 1000 units≈kg | Stainless Steel | ≈ | 42.8 | / | 59.6 | / | 67.4 | 75 | 102 | 120 | 180.4 | 213 | 235 | 258 | 282 | 307 | ||
| Size | 76 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 | 130 | ||||||
| Bolt size | Metric | M76 | M80 | M85 | M90 | M95 | M100 | M105 | M110 | M115 | M120 | M125 | M130 | |||||
| Inch | 3” | 3 1/8” | - | - | - | 4” | - | - | - | - | - | 5” | ||||||
| d | max | 79.6 | 83.6 | 88.6 | 92.9 | 97.9 | 103.9 | 108.9 | 113.9 | 118.9 | 123.9 | 128.9 | 133.9 | |||||
| min | 79.1 | 83.1 | 88.1 | 92.4 | 97.4 | 103.4 | 108.4 | 113.4 | 118.4 | 123.4 | 128.4 | 133.4 | ||||||
| dc | Nominal Size | 110 | 115 | 120 | 130 | 135 | 145 | 150 | 155 | 165 | 170 | 173 | 178 | |||||
| max | 110 | 115 | 120 | 130 | 135 | 145 | 150 | 155 | 165 | 170 | 173 | 178 | ||||||
| min | 108 | 113 | 118 | 128 | 133 | 143 | 148 | 153 | 163 | 168 | 171 | 176 | ||||||
| h | Steel | Nominal Size | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | ||||
| max | 10.25 | 10.25 | 10.25 | 10.25 | 10.25 | 10.25 | 10.25 | 10.25 | 10.25 | 10.25 | 10.25 | 10.25 | ||||||
| min | 8.75 | 8.75 | 8.75 | 8.75 | 8.75 | 8.75 | 8.75 | 8.75 | 8.75 | 8.75 | 8.75 | 8.75 | ||||||
| per 1000 units≈kg | Steel | ≈ | 333 | 360 | 378 | 477 | 498 | 589 | 613 | 635 | 753 | 779 | 766 | 792 | ||||
| h | Stainless Steel | Nominal Size | 9 | 9 | / | / | / | / | / | / | / | / | / | / | ||||
| max | 9.75 | 9.75 | / | / | / | / | / | / | / | / | / | / | ||||||
| min | 8.25 | 8.25 | / | / | / | / | / | / | / | / | / | / | ||||||
| per 1000 units≈kg | Stainless Steel | ≈ | 333 | 360 | / | / | / | / | / | / | / | / | / | / | ||||
DIN 25201 Washers FAQs
DIN 25201 is a standard in the German Industrial Standard (Deutsche Industrie Norm, referred to as DIN), which specifies the requirements and test methods for bolt pretension using elastic locking parts (such as spring washers). This standard mainly involves the control and adjustment of bolt pretightening force to ensure the reliability and safety of bolt connections during use.
The DIN 25201 standard includes guidelines and requirements for the use of preloaded bolts and elastic locking elements, as well as methods for testing and verifying these components. These regulations are generally used to ensure the reliability of bolted joints in high load and high vibration environments, such as in the automotive, mechanical equipment, railway and building structures.
In some applications, especially where the requirements for bolted connections are strict, following the DIN 25201 standard can help ensure accurate control of bolt preload, thereby improving the safety and reliability of the connection.
The DIN 25201 standard includes guidelines and requirements for the use of preloaded bolts and elastic locking elements, as well as methods for testing and verifying these components. These regulations are generally used to ensure the reliability of bolted joints in high load and high vibration environments, such as in the automotive, mechanical equipment, railway and building structures.
In some applications, especially where the requirements for bolted connections are strict, following the DIN 25201 standard can help ensure accurate control of bolt preload, thereby improving the safety and reliability of the connection.
