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MS17826-9
Castellated Nut
Description
Castellated Nut
Specifications
| Alternate Part Number | F12NE4717-098 |
|---|---|
| Bearing Surface Finish | 125.0 microinches |
| Bearing Surface Type | Chamfered or washer faced |
| Features | Low Height |
| Industry Standards/Certification | MIL-S-8879 |
| Locking Feature | Prevailing torque all metal design or prevailing torque with nonmetallic insert |
| Material | Steel |
| Maximum Dimension A | 0.328 in |
| Maximum Dimension B | 0.877 in |
| Minimum Dimension A | 0.298 in |
| Minimum Dimension B | 0.865 in |
| Minimum Dimension C | 0.978 in |
| Minimum Test Wrenching Torque | 400 in·lb |
| Minimum Ultimate Tensile Strength | 7800 lb |
| NIIN | 00-368-4656 |
| NSN | 5310-00-368-4656 |
| Nut Height | Between 0.298 inches and 0.328 inches |
| Nut Style | Hexagon castellated |
| Surface Treatment | Cadmium except insert |
| Surface Treatment Specification | Cl 2 federal specification single treatment response except insert type 2 qq-p-416 |
| Temperature Rating | 250.0 degrees fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread MIL-S-8879 | 0.5625-18 |
| Thread Qty Per Inch (tpi) | 18 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.562, 9/16-18 |
| Type | Self-Locking Castellated Nut |
| Weight | 0.025 lb |
| Width Across Flats | Between 0.865 inches and 0.877 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
Cross-reference
No interchangeable or dimensionally similar parts are on record for MS17826-9. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error