bolts › close tolerance bolts
NAS1578C4R16
Bolt
Description
Fastener Length: 1-13/32", Thread: 1/4-28, Thread Length: 27/64"
Specifications
| Fastener Length | 1.388 inches minimum and 1.418 inches maximum |
|---|---|
| Grip Diameter | 0.2490 inches minimum and 0.2495 inches maximum |
| Grip Length | 0.990 inches minimum and 1.010 inches maximum |
| Head Diameter | 0.477 inches minimum and 0.492 inches maximum |
| Head Height | 0.140 inches minimum and 0.150 inches maximum |
| Head Style | Pan no. 2 |
| Internal Drive Style | Offset cruciform (torque set) |
| Length | 1 13/32 |
| Material | Iron |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.378 inches minimum and 0.428 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.
- NAS1578C4R4
- NAS1578C4R5
- NAS1578C4R5P
- NAS1578C4R6
- NAS1578C4R9
- NAS1578C4R10
- NAS1578C4R16
Cross-reference
Similar parts
Parts with matching key dimensions — often from a different standards family. Candidates for comparison only; verify the full specification before substituting.
- NAS1578V4H16 NAS 1/4-28 · 0.073 in · Pan no. 2 · Titanium
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error