The Screw,shoulder, cataloged under National Stock Number 5305-01-375-7670, 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 17 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-375-7670 |
| Primary Part Number | 123-6078026 ITEM 41 |
| 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 | 1.750 INCHES NOMINAL IN |
| Shoulder Length | 1.250 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.375 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.500 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 303 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 |
|---|---|
| 90298A626 | Mcmaster-Carr Supply Co (USA) |
| 123-6078026 ITEM 41 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5305-01-375-7670 is a Screw,shoulder, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-375-7670 has 2 manufacturer part numbers on file: 90298A626 (Mcmaster-Carr Supply Co), 123-6078026 ITEM 41 (Naval Sea Systems Command).
Key specifications for 123-6078026 ITEM 41: Width Across Flats: 0.188 INCHES NOMINAL IN; Head Height: 0.240 INCHES MINIMUM AND 0.250 INCHES MAXIMUM IN; Fastener Length: 1.750 INCHES NOMINAL IN; Shoulder Length: 1.250 INCHES NOMINAL FIRST SHOULDER IN. 17 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.