Locking disc spring washer, shape M A4 stainless steel, plain
A4 stainless steel, type M
WSH-SER-A4-M-D8,2
Art.-no.
04048
EAN 4024835256407
Prices for customers after login
Show availability in Würth trade store
In order to check the stock in a Würth branch, please log in.
If you have any questions, please call our service hotline at +420 323 041 141.
You are not yet a Würth customer or do not yet have access data to the Online Shop? Then register now in just a few steps. After a successful check of the entered data, you will have immediate access to the stock inquiry as well as all prices and can immediately order.
Exclusively for trade customers
Register now and access more than 125,000 products
- Type M (medium): up to and including screw connections of strength class 8.8 with normal head contact
- Protection type: Screw retainer
- A4 stainless steel material number 1.4401
- Friction locking thanks to spring force
- Mechanical interlock thanks to specific surface stamping
- Protects the counter surface from damage (washer does not turn during installation)
- Minimal tightening torque distribution
Product information
Datasheets(X)
CAD data (available after login)
Application area
Machine and system construction, drive technology, conveyor technology, commercial vehicles, construction machines, vehicle construction, agricultural technology, the food industry etc.
 | |
Suitable for screw thread | M8 |
Internal diameter (d1) | 8.2 mm |
Outer diameter (d2) | 18.2 mm |
Height (h1) | 2.4 mm |
Thickness (s1) | 1.4 mm |
Material | Stainless steel A4 |
Surface | Plain |
RoHS-compliant | Yes |
Form | M |
Locking device operating principle | Serrated lock washer |
Locking function | Embedding locking device |
Comparison of locking disc spring washers and lock washers | |
| Locking disc spring washer | Lock washer with no DIN standard |
| + Twice as secure: spring-secured friction fit and positive locking + Minimal tightening torque distribution + Application range up to approx. 350°C + Reusable + Protection of the counter surface; no turning | Without a DIN standard, lock washers become a safety risk! - Very high tightening torque distribution - Only suitable for locking screws 5.8 - In the worst case scenario, lock washers can wear through surfaces and thereby promote a drop in the preload force. - No protection against unscrewing - Lock washers are not reusable - Lock washers tend to expand (risk of breakage) - They turn during tightening and loosening -> This damages the surface/counter surface |