bolts › close tolerance bolts
NAS1189E5P8
Bolt
Description
Fastener Length: 5/16", Thread: 1/4-24, Thread Length: 5/16"
Specifications
| Bearing Surface Of Head Surface Finish | 32.0 microinches |
|---|---|
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
| Fastener Length | 0.281 inches minimum and 0.312 inches maximum |
| Head Diameter | 0.568 inches minimum and 0.617 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Length | 5/16 |
| Locking Feature | Strip or pellet or patch |
| Material | Iron |
| Part Name Assigned By Controlling Agency | Navy special project |
| Screw Material | Iron alloy 660 |
| Screw Material Specification | Ams 5737 assn std single material response |
| Screw Surface Treatment | Passivate |
| Screw Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.229 inches minimum and 0.312 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Thread Surface Finish | 32.0 microinches |
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1189E5P8. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error