The Setscrew, cataloged under National Stock Number 5305-01-476-5520, 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 10 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-476-5520 |
| Primary Part Number | 124-1553927 PART NO. 20 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Fastener Length | 0.375 INCHES MAXIMUM IN |
| Thread Length | 0.375 INCHES MAXIMUM IN |
| Material Document and Classification | MIL-S-933 MIL SPEC 1ST MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Thread Class | 2 |
| Thread Quantity Per Inch | 13 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 124-1553927 PART NO. 20 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5305-01-476-5520 is a Setscrew, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-476-5520 has 1 manufacturer part number on file: 124-1553927 PART NO. 20 (Naval Sea Systems Command).
Key specifications for 124-1553927 PART NO. 20: Fastener Length: 0.375 INCHES MAXIMUM IN; Thread Length: 0.375 INCHES MAXIMUM IN; Material Document and Classification: MIL-S-933 MIL SPEC 1ST MATERIAL RESPONSE OVERALL; Nominal Thread Diameter: 0.500 INCHES IN. 10 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.