bolts › close tolerance bolts
NAS1580C4R44
Bolt
Description
Fastener Length: 3-5/32", Thread: 1/4-28, Thread Length: 3/8"
Specifications
| Countersink Angle | 99.0 degrees nominal and 101.0 degrees maximum |
|---|---|
| Fastener Length | 3.138 inches minimum and 3.168 inches maximum |
| Grip Diameter | 0.2490 inches minimum and 0.2495 inches maximum |
| Grip Length | 2.740 inches minimum and 2.760 inches maximum |
| Head Diameter | 0.464 inches minimum and 0.507 inches maximum |
| Head Style | Flat countersunk |
| Internal Drive Style | Torque-set ribbed |
| Length | 3 5/32 |
| Material | Iron |
| Material Specification | Ams 5731 assn std single material response or ams 5732 assn std single material response or ams 5737 assn std single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Specification Data | 80205-nas1580 professional/industrial association standard |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.403 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 NAS1580C4R44. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error