The Screw,shoulder, cataloged under National Stock Number 5305-00-421-6751, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-421-6751 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.060 INCHES NOMINAL IN |
| Fastener Length | 0.205 INCHES NOMINAL IN |
| Shoulder Length | 0.094 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | 21-23610 MFR REF SINGLE TREATMENT RESPONSE OVERALL |
| Shoulder Diameter | 0.1395 INCHES MINIMUM AND 0.1405 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.111 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.187 INCHES NOMINAL IN |
| Surface Treatment | NICKEL OVERALL |
| Internal Drive Style | SLOT |
| Thread Quantity Per Inch | 40 |
| Material | STEEL COMP 1213 OVERALL |
| Thread Series Designator | UNF |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 1058227 | 3/9 Design control — primary reference H & E Venture, Llc |
NSN 5305-00-421-6751 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-421-6751: Head Height: 0.060 INCHES NOMINAL IN; Fastener Length: 0.205 INCHES NOMINAL IN; Shoulder Length: 0.094 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: 21-23610 MFR REF SINGLE TREATMENT RESPONSE OVERALL. 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.