The Setscrew, cataloged under National Stock Number 5305-01-418-8639, 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 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-418-8639 |
| Primary Part Number | 754-6405243-6 |
| Item Name | Setscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Point Diameter | 1.760 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN |
| Head Height | 3.250 INCHES NOMINAL IN |
| Point Length | 2.000 INCHES NOMINAL IN |
| Fastener Length | 4.260 INCHES NOMINAL IN |
| Thread Length | 2.000 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 2.000 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Point Style | DOG |
| Width Between Flats | 2.515 INCHES MINIMUM AND 2.535 INCHES MAXIMUM IN |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 12 |
| Material | NICKEL ALLOY 502 OVERALL |
| Thread Series Designator | UN |
| 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 |
|---|---|
| 754-6405243-6 PRIMARY | Naval Sea Systems Command (USA) |
| 211069646 | Naval Sea Systems Command (USA) |
NSN 5305-01-418-8639 is a Setscrew, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-418-8639 has 2 manufacturer part numbers on file: 754-6405243-6 (Naval Sea Systems Command), 211069646 (Naval Sea Systems Command).
Key specifications for 754-6405243-6: Point Diameter: 1.760 INCHES MINIMUM AND 1.780 INCHES MAXIMUM IN; Head Height: 3.250 INCHES NOMINAL IN; Point Length: 2.000 INCHES NOMINAL IN; Fastener Length: 4.260 INCHES NOMINAL IN. 16 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.