The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-474-4051, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-474-4051 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Thread Length | 0.625 INCHES NOMINAL IN |
| Material Document and Classification | FF-S-86,TY6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNRC |
| 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 |
|---|---|
| 0.250-20UNRC-3AX.625 | 2/2 Government specification standardization U.S. Government activity |
| 0.250-20UNC-3AX 0.625LGNICUAL | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 0.250-20UNC-3AX0.625LNICUAL | 5/1 Secondary reference U.S. Government activity |
| 845-7286652ITEM30 | 5/1 Secondary reference Naval Sea Systems Command |
NSN 5305-01-474-4051 is a Screw,cap,socket Head, classified under FSC 5305, Screws. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5305-01-503-1574, 5305-01-707-2924. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-474-4051: Thread Length: 0.625 INCHES NOMINAL IN; Material Document and Classification: FF-S-86,TY6 FED SPEC SINGLE MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.250 INCHES IN; Thread Direction: RIGHT-HAND. 8 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.