bolts › close tolerance bolts
NAS1580A4R28D
Bolt
Description
Fastener Length: 2-5/32", Thread: 1/4-28, Thread Length: 13/32"
Specifications
| Countersink Angle | 99.0 degrees minimum and 101.0 degrees maximum |
|---|---|
| Fastener Length | 2.138 inches minimum and 2.168 inches maximum |
| Grip Diameter | 0.2485 inches minimum and 0.2495 inches maximum |
| Grip Length | 1.740 inches minimum and 1.760 inches maximum |
| Head Diameter | 0.464 |
| Head Style | Flat countersunk |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 2 5/32 |
| Material | Steel |
| Part Name Assigned By Controlling Agency | Screw close tolerance |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.393 inches minimum and 0.413 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.
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS1580A4R28D. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error