The Screw,shoulder, cataloged under National Stock Number 5305-00-421-9244, 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18 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-00-421-9244 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.047 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN |
| Fastener Length | 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM IN |
| Shoulder Length | 0.359 INCHES MINIMUM AND 0.362 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.218 INCHES MINIMUM AND 0.219 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.250 INCHES MINIMUM AND 0.282 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | LEDLOY FSCM 23610 MFR REF SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.125 INCHES IN |
| Features Provided | CASEHARDENED |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | NICKEL OVERALL |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 40 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.373 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 |
| Reference | Meaning |
|---|---|
| 4001290 | 3/9 Design control — primary reference H & E Venture, Llc |
NSN 5305-00-421-9244 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4820-01-175-6452. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-00-421-9244: Head Height: 0.047 INCHES MINIMUM AND 0.078 INCHES MAXIMUM IN; Fastener Length: 0.609 INCHES MINIMUM AND 0.641 INCHES MAXIMUM IN; Shoulder Length: 0.359 INCHES MINIMUM AND 0.362 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.218 INCHES MINIMUM AND 0.219 INCHES MAXIMUM 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.