The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-00-021-5259, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-021-5259 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.547 INCHES NOMINAL IN |
| Fastener Length | 3.000 INCHES NOMINAL IN |
| Thread Length | 2.000 INCHES MINIMUM IN |
| Hardness Rating | 45.0 ROCKWELL B MAXIMUM OVERALL |
| Hole Configuration Style | HEXAGON FLATS |
| Material Document and Classification | SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.875 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.312 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 14 |
| Material | STEEL OVERALL |
| Hole Quantity | 3 |
| Thread Series Designator | UNF |
| Hole Type | DRILLED |
| Hole Diameter | 0.125 INCHES NOMINAL 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 |
|---|---|
| FFS85TYPE2STYLE10P | 4/1 Identification reference U.S. Government activity |
NSN 5305-00-021-5259 is a Screw,cap,hexagon Head, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-021-5259: Head Height: 0.547 INCHES NOMINAL IN; Fastener Length: 3.000 INCHES NOMINAL IN; Thread Length: 2.000 INCHES MINIMUM IN; Hardness Rating: 45.0 ROCKWELL B MAXIMUM OVERALL. 17 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.