The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-397-3451, 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 14 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-397-3451 |
| Primary Part Number | 6404584 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.750 INCHES NOMINAL IN |
| Head Height | 0.988 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Fastener Length | 3.500 INCHES NOMINAL IN |
| Thread Length | 2.500 INCHES NOMINAL IN |
| Material Document and Classification | QQ-N-286, CLASS A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 1.000 INCHES IN |
| Head Style | ROUND |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 8 |
| Material | NICKEL ALLOY K-500 OVERALL |
| Thread Series Designator | UNRC |
| Head Diameter | 1.479 INCHES MINIMUM AND 1.500 INCHES MAXIMUM 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 |
|---|---|
| 6404584 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 211068902 | 3/9 Design control — primary reference Naval Sea Systems Command |
| 801-6404584 FIND 42 | 5/9 Secondary reference Naval Sea Systems Command |
NSN 5305-01-397-3451 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-397-3451 has 1 manufacturer part number on file: 6404584 (Naval Sea Systems Command).
Key specifications for 6404584: Width Across Flats: 0.750 INCHES NOMINAL IN; Head Height: 0.988 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN; Fastener Length: 3.500 INCHES NOMINAL IN; Thread Length: 2.500 INCHES NOMINAL IN. 14 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.