The Screw,cap,socket Head, cataloged under National Stock Number 5305-01-323-1141, 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 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-323-1141 |
| Primary Part Number | 6298012-2 |
| Item Name | Screw,cap,socket Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN |
| Fastener Length | 0.970 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | DOD-P-16232 TYM CL3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Thread Length | 0.738 INCHES MINIMUM AND 0.849 INCHES MAXIMUM IN |
| Hardness Rating | 36.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | 66 FED STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PHOSPHATE MANGANESE OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 130000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 84.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNRF |
| Head Diameter | 0.480 INCHES MINIMUM AND 0.531 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 |
|---|---|
| 6298012-2 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 6298012-2 | 5/9 Secondary reference Air Products and Chemicals Inc |
| 61024 | 5/9 Secondary reference H-K Connecticut Holding Company |
NSN 5305-01-323-1141 is a Screw,cap,socket Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-323-1141 has 1 manufacturer part number on file: 6298012-2 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-529-1568. Verify interchangeability with system specifications before substitution.
Key specifications for 6298012-2: Width Across Flats: 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM IN; Fastener Length: 0.970 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN; Surface Treatment Document and Classification: DOD-P-16232 TYM CL3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL; Thread Length: 0.738 INCHES MINIMUM AND 0.849 INCHES MAXIMUM IN. 19 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.