screws › hexagon head cap screws
B1821AH025F100N
Screw
Description
Fastener Length: 1-", Thread: 1/4-28, Thread Length: 15/16"
Specifications
| Fastener Length | 1.000 |
|---|---|
| Hardness Rating | 32.0 rockwell c minimum and 38.0 rockwell c maximum |
| Head Height | 0.150 inches minimum and 0.163 inches maximum |
| Head Style | Hexagon Head |
| Material | Steel |
| Material Specification | Sae gr 8 assn std single material response |
| Min. Tensile Strength (psi) | 150000 pounds per square inch |
| Surface Treatment | Cadmium and chromate |
| Surface Treatment Specification | Qq-p-416, type ii, class 3 fed spec all treatment responses |
| Thread Class | 2a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | 0.750 inches minimum and 0.938 inches maximum |
| Thread Qty | 28 |
| Thread Qty Per Inch (tpi) | 28 |
| Thread Series Designator | UNF |
| Thread Size | 1/4 |
| Width Between Flats | 0.428 inches minimum and 0.438 inches maximum |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
- B1821AH025F063N
- B1821AH025F075N
- B1821AH025F088N
- B1821AH025F100N
- B1821AH025F113N
- B1821AH025F125N
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.
- MS35308-308 MS 1/4-28 · 0.073 in · Hexagon Head · CRES
- MS35308-309 MS 1/4-28 · 0.073 in · Hexagon Head · CRES
- MS35308-313 MS 1/4-28 · 0.073 in · Hexagon Head · CRES
- MS90726-11 MS 1/4-28 · 0.073 in · Hexagon Head · Steel
- MS90726-12 MS 1/4-28 · 0.073 in · Hexagon Head · Steel
- MS90726-9 MS 1/4-28 · 0.073 in · Hexagon Head · Steel
- B1821BH025F113N Other 1/4-28 · 0.073 in · Hexagon Head · Steel
- B1821BH025F150N Other 1/4-28 · 0.073 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error