washers › lock washers
NAS1640-416
Lock Washer
Description
Lock Washer
Specifications
| Hardness Rating | 35.0 rockwell c minimum and 43.0 rockwell c maximum |
|---|---|
| Hole Diameter | 0.255 inches minimum and 0.263 inches maximum |
| Material | Steel |
| Material Specification | 66 fed std all material responses |
| Material Thickness | 0.062 |
| Outside Diameter | 0.489 |
| 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
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS35338-158 MS 1/4 · 31/64 in · CRES
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error