screws › close tolerance screws
NAS1580C3T18
Close Tolerance Screw
Description
flat countersunk head
Specifications
| Countersink Angle | Between 99.0 degrees and 101.0 degrees |
|---|---|
| Fastener Length | Between 1.473 inches and 1.503 inches |
| Grip Diameter | Between 0.1885 inches and 0.1895 inches |
| Grip Length | Between 1.115 inches and 1.135 inches |
| Head Diameter | Between 0.339 inches and 0.381 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Material | Iron |
| Material Specification | Ams 5731 assn standard single material response or ams 5732 assn standard single material response or ams 5737 assn standard single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Specification Data | 80205-nas1580 professional/industrial association standard |
| Surface Finish | 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Type 2 class 2 federal specification single treatment response qq-p-416 |
| Thread Class | 3a |
| Thread Diameter | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.338 inches and 0.358 inches |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
Cross-reference
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Catalog data updated 2026-07-05. Report a data error