nuts › self-locking slotted hexagon nuts
MS17826-5
Castellated Nut
Description
Castellated Nut
Specifications
| Bearing Surface Type | Washer faced |
|---|---|
| Features | Low Height |
| Industry Standards/Certification | MIL-S-8879 |
| Locking Feature | Prevailing torque with nonmetallic insert |
| Material | Plastic |
| Maximum Dimension A | 0.203 in |
| Maximum Dimension B | 0.502 in |
| Minimum Dimension A | 0.173 in |
| Minimum Dimension B | 0.492 in |
| Minimum Dimension C | 0.552 in |
| Minimum Test Wrenching Torque | 90 in·lb |
| Minimum Ultimate Tensile Strength | 2900 lb |
| Nut Height | Between 0.173 inches and 0.203 inches |
| Nut Style | Hexagon slotted |
| Surface Treatment | Cadmium except insert and chromate except insert |
| Surface Treatment Specification | Class 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 | 0.3125-24 |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.312, 5/16-24 |
| Type | Self-Locking Castellated Nut |
| Weight | .005 lb |
| Width Across Flats | Between 0.492 inches and 0.502 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 MS17826-5. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error