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B1821BH025C088N
Hexagon Head Cap Screw
Description
Fastener Length: 7/8", Thread: 1/4-20, Thread Length: 7/8", B1821BH series screw
Specifications
| Fastener Length | Between 0.844 inches and 0.875 inches |
|---|---|
| Hardness Rating | 32.0 rockwell c and 38.0 rockwell c |
| Head Height | Between 0.15 inches and 0.163 inches |
| Head Style | Hexagon Head |
| Iii End Application | Sidewinder (aim-9), rg-33 armored utility vehicle (auv); mrap buffalo mk2a2; mrap - m-atv with cs13 pop air intercept jp-5 aviation fuels;missile mk 48;chilled water a/c systems;systems satellite an/gsc-39(v)1;fire pumps;stream (std. tensioned replenishment at sea method);shipboard material handling equipment (mhe);torpedo b-1 aircraft;communications terminal aviation engine test systems (aets);support equipment |
| Length | 7/8 |
| Material | Steel |
| Material Specification | Sae j429 grade 8 assn standard single material response or astm a354 grade bd assn standard 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 type 2 sc 3 assn standard single treatment response |
| Thread Class | 2a |
| Thread Diameter | 0.250 |
| Thread Direction | Right-hand |
| Thread Length | Between 0.719 inches and 0.875 inches |
| Thread Qty | 20 |
| Thread Qty Per Inch (tpi) | 20 |
| Thread Series | UNC |
| Thread Series Designator | Unc (coarse thread) |
| Thread Size | 1/4 |
| Width Between Flats | Between 0.428 inches and 0.438 inches |
Other sizes
Parts that share this base number, ordered by size. Always verify the full specification before substituting.
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.
- MS90725-7 MS 1/4-20 · 7/8 in · Hexagon Head · Steel
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Catalog data updated 2026-07-05. Report a data error