bolts › shoulder bolts
NAS1297-4-12
Bolt
Description
Fastener Length: 1-15/64", Thread: 1/4-28, Thread Length: 15/32"
Specifications
| Fastener Length | 1.203 inches minimum and 1.243 inches maximum |
|---|---|
| Head Height | 0.172 inches minimum and 0.204 inches maximum |
| Head Style | Hexagon Head |
| Length | 1 15/64 |
| Material | Steel |
| Material Specification | Mil-b-6812 mil spec all material responses |
| Shoulder Diameter | 0.309 inches minimum first shoulder and 0.312 inches maximum first shoulder |
| Shoulder Length | 0.760 inches minimum first shoulder and 0.780 inches maximum first shoulder |
| Shoulder Shape | Round first shoulder |
| Surface Treatment | Cadmium |
| Surface Treatment Specification | Qq-p-416,type 2,class 3 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.423 inches minimum and 0.483 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.490 inches minimum and 0.502 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- NAS1297-4-3
- NAS1297-4-4
- NAS1297-4-6
- NAS1297-4-11
- NAS1297-4-12
- NAS1297-4-18
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.
- NAS1297-4-11 NAS 1/4-28 · 0.073 in · Hexagon Head · Steel
Looking for a specific part? Use the cross-reference lookup.
Catalog data updated 2026-07-05. Report a data error