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NAS1640-4
Lock Washer
Description
Lock Washer
Specifications
| Hardness Rating | 35.0 rockwell c minimum and 45.0 rockwell c maximum |
|---|---|
| Hole Diameter | 0.115 inches minimum and 0.124 inches maximum |
| Material | Steel |
| Material Specification | Fed std 66,crew 300 series mil std single material response |
| Material Thickness | 0.025 inches minimum and 0.031 inches maximum |
| Nondefinitive Specification/Std Data | C class |
| Outside Diameter | 0.212 inches maximum |
| Style Designator | Split helical-right hand |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1640-4
- NAS1640-416
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1640-4. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error