DIN 7980 - Spring lock washer for cylinder head screws
Equivalent norms: CSN 021740; PN 82008; UNI 4464A;
| Company | City | Country | Company profile |
|---|---|---|---|
| TOP Kaleliler Fasteners | ANKARA | Turkey | See Detail |
| TOP LUSAVOUGA - Hardware and Tools | Cacia | Portugal | See Detail |
| TOP Lectoe Engineering Fasteners Ltd | Wolverhampton | United Kingdom | See Detail |
| TOP Jiaxing Haina Fastener Co.,Limited | JIAXING | China | See Detail |
| TOP WENZHOU XIONGLIAN HARDWARE MECHANICAL CO., LTD. | Wenzhou | China | See Detail |
| TOP Witec Precision Industry Co. Ltd. | New Taipei City | Taiwan | See Detail |
| TOP Shanghai Tengri Metal Products Co., Ltd | Shanghai | China | See Detail |
| TOP Ferrobend | Mumbai | India | See Detail |
| TOP GC PRECISION | Ghaziabad | India | See Detail |
| TOP Hanshin Neji Co.,Ltd. | Osaka | Japan | See Detail |
| TOP Maruti Metal Industries | Jamnagar | India | See Detail |
Legend:
d1 - Inner diameter
d2 - Outer diameter
S - Washer width
Makings:
Steel: spring steel
Stainless: A2, A4
Plastic: -
Non Ferrous: -
Thread: -
Notes:
-
Table according to DIN 7980:
dimensions in mm
| Nominal | d1 | d2 | s | h | r | Mass (7,85 kg/dm3) per 1000units in kg |
For thread size | |||
| min. | max. | max. | Limit | min. | max. | |||||
| 3 | 3,1 | 3,4 | 5,6 | 1 | ±0,1 | 2 | 2,36 | 0,2 | 0,105 | M3 |
| 3,5 | 3,6 | 3,9 | 6,1 | 1 | ±0,1 | 2 | 2,36 | 0,2 | 0,114 | M3,5 |
| 4 | 4,1 | 4,4 | 7 | 1,2 | ±0,1 | 2,4 | 2,83 | 0,2 | 0,195 | M4 |
| 5 | 5,1 | 5,4 | 8,8 | 1,6 | ±0,1 | 3,2 | 3,78 | 0,2 | 0,37 | M5 |
| 6 | 6,1 | 6,5 | 9,9 | 1,6 | ±0,1 | 3,2 | 3,78 | 0,3 | 0,425 | M6 |
| 8 | 8,1 | 8,5 | 12,7 | 2 | ±0,1 | 4 | 4,72 | 0,5 | 1,05 | M8 |
| 10 | 10,2 | 10,7 | 16 | 2,5 | ±0,15 | 5 | 5,9 | 0,8 | 1,96 | M10 |
| 12 | 12,2 | 12,7 | 18 | 2,5 | ±0,15 | 5 | 5,9 | 0,8 | 2,28 | M12 |
| 14 | 14,2 | 14,7 | 21,1 | 3 | ±0,2 | 6 | 7,1 | 1 | 3,8 | M14 |
| 16 | 16,2 | 17 | 24,4 | 3,5 | ±0,2 | 7 | 8,25 | 1 | 5,94 | M16 |
| 18 | 18,2 | 19 | 26,4 | 3,5 | ±0,2 | 7 | 8,25 | 1 | 6,6 | M18 |
| 20 | 20,2 | 21,2 | 30,6 | 4,5 | ±0,2 | 9 | 10,6 | 1 | 12,3 | M20 |
| 22 | 22,5 | 23,5 | 32,9 | 4,5 | ±0,2 | 9 | 10,6 | 1 | 13,6 | M22 |
| 24 | 24,5 | 25,5 | 35,9 | 5 | ±0,2 | 10 | 11,8 | 1,6 | 18,1 | M24 |
| 27 | 27,5 | 28,5 | 38,9 | 5 | ±0,2 | 10 | 11,8 | 1,6 | 20,6 | M27 |
| 30 | 30,5 | 31,7 | 44,1 | 6 | ±0,2 | 12 | 14,2 | 1,6 | 32 | M30 |
| 33 | 33,5 | 34,7 | 47,1 | 6 | ±0,2 | 12 | 14,2 | 1,6 | 35 | M33 |
| 36 | 36,5 | 37,7 | 52,2 | 7 | ±0,25 | 14 | 16,5 | 1,6 | 52,5 | M36 |
| 42 | 42,5 | 43,7 | 60,2 | 8 | ±0,25 | 16 | 18,9 | 2 | 80 | M42 |
| 48 | 49 | 50,5 | 67 | 8 | ±0,25 | 16 | 18,9 | 2 | 90 | M48 |
| Product | Date | Country | Detail |
|---|---|---|---|
| fasteners | 2026-02-24 11:16:16 | Portugal | See Detail |
| DIN 7980 | 2025-12-11 07:57:12 | Germany | See Detail |
| DIN 7980 | 2025-11-14 13:40:12 | India | See Detail |
| DIN 7980 M3 | 2024-11-28 06:30:59 | India | See Detail |
| Bolts and nuts | 2021-10-02 03:59:37 | Kazakhstan | See Detail |
| Nuts and washers | 2021-06-18 06:11:23 | United Arab Emirates | See Detail |
| DIN 7980 | 2021-05-13 10:43:47 | India | See Detail |
| DIN 7980, M22 | 2021-02-02 04:56:19 | Singapore | See Detail |