The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-330-3161, 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 24 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-330-3161 |
| Primary Part Number | 803-5959304-X-83 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 1.000 INCHES NOMINAL IN |
| Head Height | 1.360 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN |
| Fastener Length | 6.500 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-83488 TY 2 CL 3 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-87115 CL 3 MIL SPEC 2ND TREATMENT RESPONSE FASTENER |
| Thread Length | 6.168 INCHES NOMINAL IN |
| Hardness Rating | 39.0 ROCKWELL C MINIMUM AND 45.0 ROCKWELL C MAXIMUM FASTENER |
| Hole Configuration Style | ROUND INTERNAL HEXAGON |
| Material Document and Classification | ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE FASTENER |
| Nominal Thread Diameter | 1.375 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Locking Feature | PELLET OR STRIP OR PATCH THREADS |
| Surface Treatment | ALUMINUM OR CHROMATE ZINC FASTENER |
| Minimum Tensile Strength | 180000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 6 |
| Material | PLASTIC POLYAMIDE NYLON LOCKING FEATURE |
| Material | STEEL FASTENER |
| Hole Quantity | 6 |
| Thread Series Designator | UNRC |
| Hole Type | DRILLED |
| Hole Diameter | 0.120 INCHES NOMINAL IN |
| Head Diameter | 2.038 INCHES MINIMUM AND 2.062 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 |
|---|---|
| 803-5959304-X-83 PRIMARY | Naval Sea Systems Command (USA) |
| 256-6603687-VHBM-93 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5959304-83 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-330-3161 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-330-3161 has 2 manufacturer part numbers on file: 803-5959304-X-83 (Naval Sea Systems Command), 256-6603687-VHBM-93 (Naval Sea Systems Command).
Key specifications for 803-5959304-X-83: Width Across Flats: 1.000 INCHES NOMINAL IN; Head Height: 1.360 INCHES MINIMUM AND 1.375 INCHES MAXIMUM IN; Fastener Length: 6.500 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-83488 TY 2 CL 3 MIL SPEC 1ST TREATMENT RESPONSE OR MIL-C-87115 CL 3 MIL SPEC 2ND TREATMENT RESPONSE FASTENER. 24 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.