screws › hexagon head cap screws
B1821BH025F400N
Screw
Description
Fastener Length: 4-", Thread: 1/4-28, Thread Length: 15/16"
Specifications
| Fastener Length | 4.000 |
|---|---|
| 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 |
| Minimum Yield Strength | 120000 pounds per square inch |
| Surface Treatment | Zinc and chromate |
| Surface Treatment Specification | Astm b633 ty 2 sc 3 assn std single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.250 |
| 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.
Cross-reference
No interchangeable or dimensionally similar parts are on record for B1821BH025F400N. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error