nuts › self-locking slotted hexagon nuts
MS17826-4
Castellated Nut
Description
Castellated Nut
Specifications
| Alternate Part Number | F12NTEC-0428 |
|---|---|
| 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 | 0.439 in |
| Minimum Dimension A | 0.173 in |
| Minimum Dimension B | 0.430 in |
| Minimum Dimension C | 0.482 in |
| Minimum Test Wrenching Torque | 45 in·lb |
| Minimum Ultimate Tensile Strength | 1800 lb |
| Nut Height | Between 0.173 inches and 0.203 inches |
| Nut Style | Hexagon slotted |
| Surface Treatment | Cadmium 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 | 0.2500-28 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | Unjf (fine thread with external controlled root radius) |
| Thread Size | 0.250, 1/4-28 |
| Type | Self-Locking Castellated Nut |
| Weight | 0.003 lb |
| Width Across Flats | Between 0.430 inches and 0.439 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 MS17826-4. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error