bolts › close tolerance bolts
NAS1189E4T9L
Bolt
Description
Fastener Length: 37/64", Thread: 1/4-28, Thread Length: 3/8"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.558 inches minimum and 0.589 inches maximum |
| Head Diameter | 0.491 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Torque set |
| Length | 37/64 |
| Locking Feature | Strip |
| Material | Iron |
| Min. Tensile Strength (psi) | 180000 pounds per square inch |
| Screw Material | Iron alloy 660 |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Special Features | 32.0 microinche finish underside of head |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.381 |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Thread Surface Finish | 32.0 microinches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1189E4T8L
- NAS1189E4T9L
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1189E4T9L. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error