washers › lock washers
MS51415-9
Military Standard Lock Washer
Description
Hole Diameter: 33/64"
Specifications
| Hardness Rating | 45.0 rockwell c minimum and 53.0 rockwell c maximum |
|---|---|
| Heat Treatment | Quenched and tempered |
| Hole Diameter | 0.509 inches minimum and 0.523 inches maximum |
| Material | Steel |
| Material Specification | 66 fed std all material responses |
| Material Thickness | 0.125 inches minimum |
| Nondefinitive Specification/Std Data | A class and 2 style |
| Outside Diameter | 0.873 inches maximum |
| Style Designator | Split helical-right hand |
| Surface Treatment | Zinc and chromate or zinc |
| Surface Treatment Specification | Astm b633,ty 2,cl 3 assn std 1st treatment response or astm a153 assn std 2nd treatment response |
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.
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Catalog data updated 2026-07-05. Report a data error