The Setscrew, cataloged under National Stock Number 5305-01-473-0572, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-473-0572 |
| Primary Part Number | 124-6294787 PC 21 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fastener Length | 0.500 INCHES NOMINAL IN |
| Material Document and Classification | QQ-B-637 FED SPEC 1ST MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Thread Direction | RIGHT-HAND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNF |
| 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 |
|---|---|
| 124-6294787 PC 21 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6294787 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5305-01-473-0572 is a Setscrew, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-473-0572 has 1 manufacturer part number on file: 124-6294787 PC 21 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 2040-01-473-1136. Verify interchangeability with system specifications before substitution.
Key specifications for 124-6294787 PC 21: Fastener Length: 0.500 INCHES NOMINAL IN; Material Document and Classification: QQ-B-637 FED SPEC 1ST 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.