screws › hexagon head cap screws
B1821BH044C325N
Screw
Description
Fastener Length: 3-1/4", Thread: 7/16-14, Thread Length: 1-5/16"
Specifications
| Fastener Length | 3.156 inches minimum and 3.250 inches maximum |
|---|---|
| Head Height | 0.272 inches minimum and 0.291 inches maximum |
| Head Style | Hexagon Head |
| Length | 3 1/4 |
| Material | Steel |
| Material Specification | Sae j429 grade 8 assn std single material response or astm a354 grade bd assn std single material response |
| Min. Tensile Strength (psi) | 150000 pounds per square inch |
| Surface Finish | 63.0 microinches threads |
| Surface Treatment | Zinc and chromate |
| Surface Treatment Specification | Astm b633 ty 2 sc 3 assn std single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.438 |
| Thread Direction | Right-hand |
| Thread Length | 1.125 inches minimum and 1.313 inches maximum |
| Thread Qty | 14 |
| Thread Qty Per Inch (tpi) | 14 |
| Thread Series Designator | UNC |
| Thread Size | 7/16 |
| Width Between Flats | 0.612 inches minimum and 0.625 inches maximum |
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.
- MS35307-398 MS 7/16-14 · 0.099 in · Hexagon Head · CRES
- MS90725-98 MS 7/16-14 · 0.099 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error