The Screw,shoulder, cataloged under National Stock Number 5305-01-444-4258, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-444-4258 |
| Primary Part Number | 752-6405261-29 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Width Across Flats | 0.625 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN |
| Head Height | 0.750 INCHES NOMINAL IN |
| Fastener Length | 2.625 INCHES NOMINAL IN |
| Shoulder Length | 1.250 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.758 INCHES MINIMUM AND 0.760 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 1.375 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.750 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Minimum Tensile Strength | 170000 POUNDS PER SQUARE INCH LBS |
| Minimum Yield Strength | 155000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 10 |
| Material | STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.107 INCHES MINIMUM AND 1.125 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 |
|---|---|
| 752-6405261-29 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 752-6405261-53 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5305-01-444-4258 is a Screw,shoulder, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-444-4258 has 1 manufacturer part number on file: 752-6405261-29 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-444-4898. Verify interchangeability with system specifications before substitution.
Key specifications for 752-6405261-29: Width Across Flats: 0.625 INCHES MINIMUM AND 0.631 INCHES MAXIMUM IN; Head Height: 0.750 INCHES NOMINAL IN; Fastener Length: 2.625 INCHES NOMINAL IN; Shoulder Length: 1.250 INCHES NOMINAL FIRST SHOULDER 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.