How to find the right Spring Lock Washers AI guide
Written by an AI model from its trained knowledge.
What the AI looks for in Spring Lock Washers
- Standard
- Look for ASME B18.21.1 (inch) or DIN 127 (metric) helical spring lock washers, and match the section (light, regular, or heavy) to the drawing. Standardized dimensions and hardness ensure the washer fits the bolt head and does not crush flat prematurely.
- Bolt size and system
- Order by the bolt's nominal diameter in the same thread system. A loose inner diameter lets the split ends ride off the bearing surface.
- Material
- Use hardened spring steel for strength. Choose 18-8 or 316 stainless for corrosion resistance, accepting that stainless springs have less tension. The spring action depends on temper. Soft or cheap steel flattens permanently on first tightening.
- Appropriate use
- Reserve split washers for low-preload or legacy assemblies, and switch to wedge pairs or threadlocker where vibration matters. At full preload the washer is flat and contributes almost no locking effect.
Brands that matter
- Hillman: Common source for small packs in inch and metric sizes.
- uxcell: Bulk metric and inch assortments in zinc steel and stainless.
What to avoid
- Unspecified 'carbon steel' washers that flatten on first use
- Reusing a split washer whose gap has closed
- Using split washers on soft materials without a flat washer underneath to prevent gouging
Questions
Is a Belleville (conical disc) washer the same as a split lock washer?
No. A Belleville washer is a conical disc spring that helps maintain preload. It is not a split lock washer and is chosen by load and deflection rather than just bolt size.