screws › close tolerance screws
NAS1974C4T
Close Tolerance Screw
Description
Fastener Length: 11/16", Thread: 1/4-28, Thread Length: 7/16
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 0.660 inches minimum and 0.690 inches maximum |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 0.240 inches minimum and 0.260 inches maximum |
| Head Diameter | 0.449 |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 11/16 |
| Material | Iron |
| Part Name Assigned By Controlling Agency | Screw |
| Surface Treatment | Passivate |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.410 inches minimum and 0.440 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
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 NAS1974C4T. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error