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NAS1789C4
Locknut
Description
Thread Size: 1/4", Nut Length: 39/64", Nut Height: 9/32
Specifications
| Counterbore Diameter | 0.254 inches minimum nut |
|---|---|
| Distance From Aperture Center To Mounting Hole Center | 0.281 |
| Features Provided | Floating nut |
| Locking Feature | Prevailing torque all metal design |
| Lubrication | Dry film lubricant |
| Material | Iron |
| Material Specification | Ams5525 assn std 1st material response or ams5735 assn std 2nd material response or ams5737 assn std 3rd material response |
| Mounting Hole Arrangement Style | 2 holes |
| Mounting Hole Diameter | 0.098 inches minimum and 0.103 inches maximum |
| Nut Height | 0.281 inches maximum |
| Nut Length | 0.617 inches maximum |
| Nut Mounting Provision | Straight holes |
| Nut Style | Plate |
| Plate Thickness | 0.035 inches maximum |
| Plate Width | 0.502 inches maximum |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Temperature Rating | 800.0 deg fahrenheit |
| Thread Class | 3b |
| Thread Direction | Right-hand |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series | UNJF |
| Thread Size | 0.250 |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1789C3
- NAS1789C4
- NAS1789C4W
- NAS1789C08
- NAS1789C08M
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.
- NAS1068RC4 NAS 1/4-28 · Iron
- NAS1068RC4M NAS 1/4-28 · Iron
- NAS686C4K NAS 1/4-28 · Iron
- NAS687C4 NAS 1/4-28 · Steel
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error