The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-287-2908, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-287-2908 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Surface Finish | 63.0 MICROINCHES THREADS |
| Head Height | 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN |
| Fastener Length | 3.312 INCHES MINIMUM AND 3.500 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | D0D-P-16232 TYZ MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 2.000 INCHES MINIMUM AND 2.188 INCHES MAXIMUM IN |
| Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 38.0 ROCKWELL C MAXIMUM OVERALL |
| Shank Unthreaded Hole Diameter | 0.138 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FIRST HOLE IN |
| Material Document and Classification | SAE GR8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.285 INCHES MINIMUM AND 1.312 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 2 TYPE AND 10 STYLE AND 8 GRADE |
| Surface Treatment | PHOSPHATE ZINC OVERALL |
| Minimum Tensile Strength | 150000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 3.052 INCHES MINIMUM AND 3.260 INCHES MAXIMUM FIRST HOLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MS51108-191 | 2/2 Government specification standardization U.S. Government activity |
| FF-S-85 | 4/1 Identification reference U.S. Government activity |
NSN 5305-01-287-2908 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-287-2908: Surface Finish: 63.0 MICROINCHES THREADS; Head Height: 0.531 INCHES MINIMUM AND 0.563 INCHES MAXIMUM IN; Fastener Length: 3.312 INCHES MINIMUM AND 3.500 INCHES MAXIMUM IN; Surface Treatment Document and Classification: D0D-P-16232 TYZ MIL SPEC SINGLE TREATMENT RESPONSE OVERALL. 20 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.