washers › flat washers
MS21299C4K
Military Standard Flat Washer
Description
Hole Diameter: 1/4", recessed, steel, MS21299 series washer
Specifications
| End Application | Armored vehicle mounted:multiple launc (coarse thread)h rocket system rocket 1055-01-450-4243;launc (coarse thread)her |
|---|---|
| Hardness Rating | Between 35.0 rockwell c and 42.0 rockwell c |
| Hole Diameter | Between 0.251 inches and 0.255 inches |
| Material | Steel |
| Material Specification | 17-4ph assn standard single material response ams 5604 |
| Material Thickness | Between 0.057 inches and 0.069 inches |
| Outside Diameter | Between 0.481 inches and 0.491 inches |
| Recess Angle | 90.0 degrees |
| Recess Diameter | Between 0.340 inches and 0.350 inches |
| Specification Data | 80205-nas-21299 professional/industrial association standard |
| Style Designator | Recessed |
| Surface Finish | 125.0 microinches all surfaces |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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