screws › close tolerance screws
NAS1974C7T
Close Tolerance Screw
Description
flat head
Specifications
| Countersink Angle | Between 99 degrees and 101 degrees |
|---|---|
| Fastener Length | Between 0.848 inches and 0.878 inches |
| Grip Diameter | Between 0.2485 inches and 0.2495 inches |
| Grip Length | Between 0.428 inches and 0.448 inches |
| Head Diameter | Between 0.577 inches and 0.635 inches |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Material | Iron |
| Material Specification | Ams5731 assn standard single material response or ams5737 assn standard single material response |
| Min. Tensile Strength (psi) | 180000 pounds per square inch |
| Specification Data | 80205-nas1974 professional/industrial association standard |
| Surface Finish | 32.0 microinches grip, 32.0 microinches surface of head, 32.0 microinches threads |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.400 inches and 0.450 inches |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1974C4T
- NAS1974C7T
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1974C7T. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error