The Setscrew, cataloged under National Stock Number 5305-01-355-6941, 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 17 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 | 5305-01-355-6941 |
| Primary Part Number | 845-6640841-TA-51 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Point Diameter | 0.310 INCHES NOMINAL IN |
| Head Height | 0.190 INCHES NOMINAL IN |
| Point Length | 0.310 INCHES NOMINAL IN |
| Fastener Length | 5.810 INCHES NOMINAL IN |
| Thread Length | 5.310 INCHES NOMINAL IN |
| Material Document and Classification | QQN281 FED SPEC ALL MATERIAL RESPONSES OVERALL |
| Point Chamfer Angle | 45.0 DEGREES NOMINAL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Point Style | CHAMFER DOG |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 13 |
| Material | NICKEL ALLOY R-405 OR NICKEL ALLOY 400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.750 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 |
| Part Number | Manufacturer |
|---|---|
| 845-6640841-TA-51 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5305-01-355-6941 is a Setscrew, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-355-6941 has 1 manufacturer part number on file: 845-6640841-TA-51 (Naval Sea Systems Command).
Key specifications for 845-6640841-TA-51: Point Diameter: 0.310 INCHES NOMINAL IN; Head Height: 0.190 INCHES NOMINAL IN; Point Length: 0.310 INCHES NOMINAL IN; Fastener Length: 5.810 INCHES NOMINAL IN. 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.