screws › hexagon head cap screws
B1821BH031C100N
Hexagon Head Cap Screw
Description
Fastener Length: 0-63/64", Thread: 1/4-18, Thread Length: 0-63/64", B1821 series screw
Specifications
| Fastener Length | 0.969 inches minimum and 1.000 inches maximum |
|---|---|
| Features Provided | Finished head |
| Head Height | 0.195 inches minimum and 0.211 inches maximum |
| Head Style | Hexagon Head |
| Length | 0 63/64 |
| 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 |
| Surface Treatment Specification | Astm b633 assn std single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.312 |
| Thread Direction | Right-hand |
| Thread Length | 0.830 inches minimum and 1.000 inches maximum |
| Thread Qty | 18 |
| Thread Qty Per Inch (tpi) | 18 |
| Thread Series Designator | UNC |
| Thread Size | 1/4 |
| Width Between Flats | 0.489 inches minimum and 0.500 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 B1821BH031C100N. Try the cross-reference lookup to search by a different part number.
Catalog data updated 2026-07-05. Report a data error