The Screw,shoulder, cataloged under National Stock Number 5305-01-285-2751, 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 18 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-285-2751 |
| Primary Part Number | 6289089 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.125 INCHES NOMINAL IN |
| Head Height | 0.177 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN |
| Fastener Length | 1.850 INCHES MINIMUM AND 1.861 INCHES MAXIMUM IN |
| Shoulder Length | 1.500 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-N-290 CL 1 GR G FED SPEC SINGLE TREATMENT RESPONSE GRIP |
| Shoulder Diameter | 0.246 INCHES MINIMUM AND 0.248 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.350 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | NICKEL GRIP |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 24 |
| Material | STEEL COMP 301 OR STEEL COMP 302 OR STEEL COMP 302B OR STEEL COMP 303 OR STEEL COMP 303SE OR STEEL COMP 304 OR STEEL COMP 304L OR STEEL COMP 305 OR STEEL COMP 308 OR STEEL COMP 309 OR STEEL COMP 309S OR STEEL COMP 310 OR STEEL COMP 310S OR STEEL COMP 314 OR STEEL COMP 316 OR STEEL COMP 316L OR STEEL COMP 317 OR STEEL COMP 321 OR STEEL COMP 347 OR STEEL COMP 348 OR STEEL COMP 384 OR STEEL COMP 385 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.357 INCHES MINIMUM AND 0.375 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 |
|---|---|
| 6289089 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5305-01-285-2751 is a Screw,shoulder, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-285-2751 has 1 manufacturer part number on file: 6289089 (Naval Sea Systems Command).
Key specifications for 6289089: Width Across Flats: 0.125 INCHES NOMINAL IN; Head Height: 0.177 INCHES MINIMUM AND 0.187 INCHES MAXIMUM IN; Fastener Length: 1.850 INCHES MINIMUM AND 1.861 INCHES MAXIMUM IN; Shoulder Length: 1.500 INCHES NOMINAL FIRST SHOULDER IN. 18 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.