screws › socket head cap screws
NAS1189E4P12B
Socket Head Cap Screw
Description
Socket Head Cap Screw
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.719 inches minimum and 0.750 inches maximum |
| Hardness Rating | 24.0 rockwell c minimum fastener and 35.0 rockwell c maximum fastener |
| Head Diameter | 0.442 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Cross recess type 1 |
| Locking Feature | Patch threads |
| Material | Iron |
| Material Specification | Ams5737 assn std single material response fastener, Mil-f-18240 mil spec single material response locking feature |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Minimum Yield Strength | 85000 pounds per square inch |
| Specification Data | 80205-nas1189 professional/industrial association standard |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response fastener |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.542 inches minimum and 0.644 inches maximum |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error