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MS21044D04
4-40 Thread Size MS21044 Self-Locking Machine Nut
Description
4-40 Thread Size MS21044 Self-Locking Machine Nut
Specifications
| Bearing Surface Finish | 125.0 microinches |
|---|---|
| Bearing Surface Type | Chamfered or washer faced |
| Countersink Angle | 88.0 degrees nut |
| Features | Nylon Insert |
| Industry Standards/Certification | MS21044 |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Lubrication | Soluble lubricant |
| Material | Aluminum |
| Maximum Dimension A | 0.157 in |
| Maximum Dimension B | 0.251 in |
| Minimum Dimension A | 0.133 in |
| Minimum Dimension B | 0.243 in |
| Minimum Dimension C | 0.268 in |
| NIIN | 00-857-5548 |
| NSN | 5310-00-857-5548 |
| Nut Height | 0.133 mils and 0.157 centimeters |
| Nut Style | Hexagon |
| Service Temperature | 250 ºF |
| Special Features | Color blue |
| Surface Treatment | Anodize except insert or chromate except insert |
| Surface Treatment Specification | Mil-a-8625 military specification 1st treatment response except insert |
| Temperature Rating | 250.0 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread MIL-S-8879 | 0.1120-40 |
| Thread Qty | 40 |
| Thread Qty Per Inch (tpi) | 40 |
| Thread Series | UNJC |
| Thread Size | 0.112, 4-40 |
| Type | Self-Locking Nut |
| Weight | 0.0005 lb |
| Width Across Flats | Between 0.243 inches and 0.251 inches |
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.
- MS21045L04 MS #4-40 · Steel
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Catalog data updated 2026-07-05. Report a data error