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MS21045-10
Military Standard Locking Hexagon Nut Self
Description
Nut
Specifications
| Alternate Part Number | AN365-1018C |
|---|---|
| Bearing Surface Finish | 125.0 microinches, 125.0 µin |
| Bearing Surface Type | Chamfered Faced, Chamfered or washer faced |
| Countersink Angle | 88.0 degrees nut |
| Features | Regular Height |
| Industry Standards/Certification | MS21045 |
| Locking Feature | Prevailing Torque All Metal Design |
| Lubricant | Non-Dry Lubricant |
| Lubrication | Soluble Lubricant |
| Material | Steel |
| Maximum Dimension A | 0.766 in |
| Maximum Dimension B | 0.940 in |
| Maximum Nut Height | 0.766 in |
| Maximum Width Across Flats | 0.940 in |
| Minimum Dimension A | 0.732 in |
| Minimum Dimension B | 0.928 in |
| Minimum Dimension C | 1.051 in |
| Minimum Dimension F | 0.274 in |
| Minimum Nut Height | 0.732 in |
| Minimum Width Across Flats | 0.928 in |
| NIIN | 00-982-5009 |
| NSN | 5310-00-982-5009 |
| Nominal Countersunk Angle (Nut) | 88.0 º |
| Nominal Temperature Rating | 450.0 ºF |
| Nominal Thread Size | 0.625 in |
| Nut Height | Between 0.732 inches and 0.766 inches |
| Nut Style | Hexagon |
| Service Temperature | 450 ºF |
| Surface Treatment | Cadmium |
| Surface Treatment Document and Classification | QQ-P-416,TY 2,CL 3 FED SPEC Single Treatment Response |
| Surface Treatment Specification | Cl 3 federal specification single treatment response type 2 qq-p-416 |
| Temperature Rating | 450.0 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread MIL-S-8879 | 0.6250-18 |
| Thread Qty Per Inch (tpi) | 18 |
| Thread Quantity per Inch | 18 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.625, 9/16-18 |
| Type | Self-Locking Nut |
| Weight | 0.08 lb |
| Width Across Flats | Between 0.928 inches and 0.940 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
Interchangeable
Parts that share a National Stock Number or are listed as an alternate for MS21045-10 — functionally equivalent.
- AN365-1018C Listed alternate Steel
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- MS21044-N10 MS 5/8-18 · Steel
- MS21044C10 MS 5/8-18 · CRES
- MS21044N10 MS 5/8-18 · Steel
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Catalog data updated 2026-07-05. Report a data error