screws › hexagon head cap screws
B1821BH038F125N
Hexagon Head Cap Screw
Description
Fastener Length: 1-1/4", Thread: 3/8-24, Thread Length: 1-3/16", B1821 series screw
Specifications
| Fastener Length | 1.250 |
|---|---|
| Hardness Rating | 32.0 rockwell c minimum and 38.0 rockwell c maximum |
| Head Height | 0.226 inches minimum and 0.243 inches maximum |
| Head Style | Hexagon Head |
| Length | 1 1/4 |
| Material | Steel |
| Material Specification | Sae j429 grade 8 assn std single material response |
| Min. Tensile Strength (psi) | 150000 pounds per square inch |
| Nondefinitive Specification/Std Data | 2 type and 10p style and 8 grade |
| Surface Treatment | Zinc and chromate |
| Surface Treatment Specification | Astm b633 ty 2 sc 3 assn std single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.375 |
| Thread Direction | Right-hand |
| Thread Length | 1.000 inches minimum and 1.188 inches maximum |
| Thread Qty | 24 |
| Thread Qty Per Inch (tpi) | 24 |
| Thread Series Designator | UNF |
| Thread Size | 3/8 |
| Width Between Flats | 0.551 inches minimum and 0.562 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- B1821BH038F088N
- B1821BH038F125N
- B1821BH038F150N
- B1821BH038F175N
- B1821BH038F300N
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.
- MS90726-62 MS 3/8-24 · 0.073 in · Hexagon Head · Steel
- MS90726-65 MS 3/8-24 · 0.073 in · Hexagon Head · Steel
- B1821BH038F150N Other 3/8-24 · 0.073 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error