The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-333-9879, 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 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-333-9879 |
| Primary Part Number | 803-5959303-X-51 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 1.000 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Head Height | 1.500 INCHES MINIMUM IN |
| Fastener Length | 2.750 INCHES NOMINAL IN |
| Thread Length | 2.280 INCHES MINIMUM IN |
| Shank Unthreaded Hole Diameter | 0.380 INCHES NOMINAL FIRST HOLE IN |
| Nominal Thread Diameter | 1.500 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 6 |
| Material | TITANIUM ALLOY UNS R56400 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 2.000 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 2.250 INCHES MINIMUM 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 |
|---|---|
| 803-5959303-X-51 PRIMARY | Naval Sea Systems Command (USA) |
| 524-6603688-VHBA-62 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5959303-51 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-333-9879 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-333-9879 has 2 manufacturer part numbers on file: 803-5959303-X-51 (Naval Sea Systems Command), 524-6603688-VHBA-62 (Naval Sea Systems Command).
Key specifications for 803-5959303-X-51: Width Across Flats: 1.000 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN; Head Height: 1.500 INCHES MINIMUM IN; Fastener Length: 2.750 INCHES NOMINAL IN; Thread Length: 2.280 INCHES MINIMUM IN. 15 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.