bolts › close tolerance bolts
NAS1578C3T4
Close Tolerance Bolt
Description
Flat Pan Head Bolt
Specifications
| Country of Origin | USA |
|---|---|
| Fastener Length | Between 0.598 inches and 0.628 inches |
| Grip Diameter | Between 0.1890 inches and 0.1895 inches |
| Grip Length | Between 0.240 inches and 0.260 inches |
| Head Diameter | Between 0.360 inches and 0.374 inches |
| Head Height | Between 0.115 inches and 0.125 inches |
| Head Style | Pan no. 2 |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 5/8 |
| Material | Iron |
| Material Specification | Ams5731 assn standard single material response or ams5732 assn standard single material response or ams5737 assn standard single material response |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| NIIN | 01-186-1230 |
| NSN | 5305-01-186-1230 |
| Specification Data | 80205-nas1578 professional/industrial association standard |
| Surface Finish | 32.0 microinches bearing surface of head, 32.0 microinches grip, 32.0 microinches threads |
| Surface Treatment | Passivate |
| Surface Treatment Specification | Qq-p-35 federal specification single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.190 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.338 inches and 0.378 inches |
| Thread Qty | 32 |
| Thread Qty Per Inch (tpi) | 32 |
| Thread Series | UNJF |
| Thread Series Designator | Unjf (fine thread with external controlled root radius) |
| Thread Size | 10 |
| Weight | .005 lb |
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 NAS1578C3T4. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error