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121673-4-104
Bolt
Description
Fastener Length: 6-15/16", Thread: 1/4-28, Thread Length: 21/64"
Specifications
| Distance From Head Largest Bearing Surface To Shank Hole Center | 6.818 inches minimum first hole and 6.848 inches maximum first hole |
|---|---|
| Fastener Length | 6.918 inches minimum and 6.938 inches maximum |
| Grip Diameter | 0.2483 inches minimum and 0.2492 inches maximum |
| Grip Length | 6.500 inches minimum and 6.516 inches maximum |
| Hardness Rating | 36.0 rockwell c minimum and 41.0 rockwell c maximum |
| Head Height | 0.126 inches minimum and 0.141 inches maximum |
| Head Style | Dished hexagon |
| Length | 6 15/16 |
| Material | Steel |
| Shank Unthreaded Hole Diameter | 0.076 inches minimum first hole and 0.086 inches maximum first hole |
| Special Features | Detent ring in shank |
| Specification Data | 76301-st3-735 manufacturers standard |
| Surface Finish | 63.0 microinches bearing surface of head, 63.0 microinches grip |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416 ty 2 cl 2 fed spec single treatment response |
| Thread Class | 3a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.282 inches minimum and 0.333 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNJF |
| Thread Size | 1/4 |
| Width Between Flats | 0.430 inches minimum and 0.439 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- 121673-4-13
- 121673-4-104
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.
- ST3M735-4-104 Other 1/4-28 · 9/64 in · Dished hexagon · Steel
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Catalog data updated 2026-07-05. Report a data error