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MS21083D8
0.5000-20 Thread Size Self-Locking Machine Nut
Description
0.5000-20 Thread Size Self-Locking Machine Nut
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Bearing Surface Type | Chamfered or washer faced |
| Countersink Angle | 88.0 degrees nominal nut |
| Features | Low Height |
| Industry Standards/Certification | MS21083 |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Material | Aluminum |
| Maximum Dimension A | 0.328 in |
| Maximum Dimension B | 0.752 in |
| Minimum Dimension A | 0.298 in |
| Minimum Dimension B | 0.741 in |
| Minimum Dimension C | 0.837 in |
| Nut Height | 0.328 inches maximum |
| Nut Style | Hexagon |
| Service Temperature | 250 ºF |
| Surface Treatment | Anodize except insert or chromate except insert |
| Surface Treatment Specification | Mil-a-8625 mil spec 1st treatment response except insert or mil-c-5541 mil spec 2nd treatment response except insert |
| Temperature Rating | 250.0 deg fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread MIL-S-8879 | 0.5000-20 |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | UNJF |
| Thread Size | 0.500, 1/2-20 |
| Type | Self-Locking Nut |
| Weight | .005 lb |
| Width Across Flats | 0.741 inches minimum and 0.752 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- MS21083D04
- MS21083D8
- MS21083D9
- MS21083D12
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.
- NAS1022C8 NAS 1/2-20 · Steel
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error