The Screw,shoulder, cataloged under National Stock Number 5305-01-714-4892, 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 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5305-01-714-4892 |
| Primary Part Number | 512-8839672-21-4 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.188 INCHES NOMINAL IN |
| Head Height | 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN |
| Fastener Length | 1.480 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN |
| Shoulder Length | 0.995 INCHES MINIMUM AND 1.005 INCHES MAXIMUM OVERALL IN |
| Shoulder Diameter | 0.3710 INCHES MINIMUM AND 0.3730 INCHES MAXIMUM OVERALL IN |
| Thread Length | 0.480 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND OVERALL |
| Material Document and Classification | NAS-21472 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.3125 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS-51975 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Chamfer Angle | 30.0 DEGREES MINIMUM AND 45.0 DEGREES MAXIMUM |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.543 INCHES MINIMUM AND 0.562 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 |
|---|---|
| 512-8839672-21-4 | Naval Sea Systems Command (USA) |
| LSA005045-21-4 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 512-8839672-21-4 | 5/2 Secondary reference U.S. Government activity |
| 211049872 | 5/2 Secondary reference U.S. Government activity |
| MS51975-19X | 3/2 Design control — primary reference U.S. Government activity |
| MS51975-19X | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-714-4892 is a Screw,shoulder, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-714-4892 has 2 manufacturer part numbers on file: 512-8839672-21-4 (Naval Sea Systems Command), LSA005045-21-4 (Naval Sea Systems Command).
Key specifications for 512-8839672-21-4: Width Across Flats: 0.188 INCHES NOMINAL IN; Head Height: 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Fastener Length: 1.480 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN; Shoulder Length: 0.995 INCHES MINIMUM AND 1.005 INCHES MAXIMUM 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.