The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-086-9876, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The American Society of Mechanical Engineers. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-086-9876 |
| Primary Part Number | B1821BH025F125D |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The American Society of Mechanical Engineers |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES THREADS |
| Head Height | 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN |
| Fastener Length | 1.188 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | ASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.750 INCHES MINIMUM AND 0.938 INCHES MAXIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Hole Configuration Style | HEXAGON FLATS |
| Material Document and Classification | 66 FED STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.428 INCHES MINIMUM AND 0.438 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 10P STYLE AND 8 GRADE |
| Surface Treatment | ZINC AND CHROMATE OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 1013 OR STEEL COMP 1015 OR STEEL COMP 1016 OR STEEL COMP 1017 OR STEEL COMP 1018 OR STEEL COMP 1019 OR STEEL COMP 1020 OR STEEL COMP 1021 OR STEEL COMP 1022 OR STEEL COMP 1023 OR STEEL COMP 1524 OR STEEL COMP 1025 OR STEEL COMP 1026 OR STEEL COMP 1527 OR STEEL COMP 1029 OR STEEL COMP 1030 OR STEEL COMP 1033 OR STEEL COMP 1034 OR STEEL COMP 1035 OR STEEL COMP 1536 OR STEEL COMP 1037 OR STEEL COMP 1038 OR STEEL COMP 1039 OR STEEL COMP 1040 OR STEEL COMP 1541 OVERALL |
| Hole Quantity | 1 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.061 INCHES MINIMUM AND 0.069 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| B1821BH025F125D PRIMARY | The American Society of Mechanical Engineers (USA) |
| Reference | Meaning |
|---|---|
| MS18153-9 | 5/9 Secondary reference U.S. Government activity |
| FF-S-85 | 4/1 Identification reference U.S. Government activity |
| B1821BH025F125D | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-086-9876 is a Screw,cap,hexagon Head, manufactured by The American Society of Mechanical Engineers, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-086-9876 has 1 manufacturer part number on file: B1821BH025F125D (The American Society of Mechanical Engineers).
Key specifications for B1821BH025F125D: Surface Finish: 63.0 MICROINCHES THREADS; Head Height: 0.150 INCHES MINIMUM AND 0.163 INCHES MAXIMUM IN; Fastener Length: 1.188 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN; Surface Treatment Document and Classification: ASTM B633 TY 2 SC 3 ASSN STD SINGLE TREATMENT RESPONSE OVERALL. 22 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.