The Screw,cap,hexagon Head, cataloged under National Stock Number 5305-01-274-7958, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-274-7958 |
| Primary Part Number | 207-6015504 ITEM 25 |
| Item Name | Screw,cap,hexagon Head |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Head Height | 0.378 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN |
| Fastener Length | 2.420 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN |
| Thread Length | 1.500 INCHES MINIMUM IN |
| Hardness Rating | 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL |
| Material Document and Classification | ASTM A193 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.906 INCHES MINIMUM AND 0.928 INCHES MAXIMUM IN |
| Nondefinitive Spec/std Data | 1 TYPE AND B7 GRADE |
| Minimum Tensile Strength | 125000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 105000 POUNDS PER SQUARE INCH LBS |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL COMP 4140 OR STEEL COMP 4142 OR STEEL COMP 4145 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 6502476 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 207-6015504 ITEM 25 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| MIL-DTL-1222 | 4/1 Identification reference U.S. Government activity |
| MIL-S-1222 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-274-7958 is a Screw,cap,hexagon Head, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-274-7958 has 2 manufacturer part numbers on file: 6502476 (Huntington Ingalls Inc Div Newport News Shipbuilding), 207-6015504 ITEM 25 (Naval Sea Systems Command).
Key specifications for 207-6015504 ITEM 25: Head Height: 0.378 INCHES MINIMUM AND 0.444 INCHES MAXIMUM IN; Fastener Length: 2.420 INCHES MINIMUM AND 2.560 INCHES MAXIMUM IN; Thread Length: 1.500 INCHES MINIMUM IN; Hardness Rating: 25.0 ROCKWELL C MINIMUM AND 34.0 ROCKWELL C MAXIMUM OVERALL. 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.