bolts › close tolerance bolts
NAS144A16
Close Tolerance Bolt
Description
Fastener Length: 63/64", Thread: 1/4-28, Head Width: 7/32", Thread Length: 33/64"
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 0.834 inches minimum first hole and 0.854 inches maximum first hole |
|---|---|
| Fastener Length | 0.985 inches minimum and 1.015 inches maximum |
| Head Diameter | 0.430 inches minimum and 0.438 inches maximum |
| Head Height | 0.226 |
| Head Style | Bevel-conical |
| Internal Drive Style | Hexagon |
| Length | 0 63/64 |
| Material | Steel |
| Min. Tensile Strength (psi) | 160000 pounds per square inch |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.081 inches maximum first hole |
| Specification Data | 80205-nas144 professional/industrial association standard |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416,type 2 cl 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.475 inches minimum and 0.525 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Across Flats | 0.219 inches minimum and 0.221 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS144A16
- NAS144A17
Cross-reference
No interchangeable or dimensionally similar parts are on record for NAS144A16. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error