The Screw,shoulder, cataloged under National Stock Number 5305-01-720-7885, 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-720-7885 |
| Primary Part Number | 167-8835598-25 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.500 INCHES NOMINAL IN |
| Head Height | 0.610 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN |
| Fastener Length | 3.470 INCHES MINIMUM AND 3.500 INCHES MAXIMUM IN |
| Shoulder Length | 2.500 INCHES NOMINAL OVERALL IN |
| Shoulder Diameter | 0.9960 INCHES MINIMUM AND 0.9980 INCHES MAXIMUM OVERALL IN |
| Thread Length | 0.970 INCHES MINIMUM AND 1.000 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND OVERALL |
| Material Document and Classification | QQ-N-286 SOLUTION ANNEALED AND AGE HARDENED FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.7500 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS-51975 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Minimum Tensile Strength | 130000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 10 |
| Material | NICKEL ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.267 INCHES MINIMUM AND 1.312 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 |
|---|---|
| 167-8835598-25 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| R5471124-25 | 5/2 Secondary reference U.S. Government activity |
| MS51975K64 | 3/2 Design control — primary reference U.S. Government activity |
| MS51975K64 | 5/9 Secondary reference U.S. Government activity |
| LSA002154-25 | 5/2 Secondary reference U.S. Government activity |
NSN 5305-01-720-7885 is a Screw,shoulder, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-720-7885 has 1 manufacturer part number on file: 167-8835598-25 (Naval Sea Systems Command).
Key specifications for 167-8835598-25: Width Across Flats: 0.500 INCHES NOMINAL IN; Head Height: 0.610 INCHES MINIMUM AND 0.625 INCHES MAXIMUM IN; Fastener Length: 3.470 INCHES MINIMUM AND 3.500 INCHES MAXIMUM IN; Shoulder Length: 2.500 INCHES NOMINAL OVERALL 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.