The Screw,shoulder, cataloged under National Stock Number 5305-01-516-1958, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5305-01-516-1958 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 0.156 INCHES NOMINAL IN |
| Head Height | 0.209 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN |
| Fastener Length | 0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM IN |
| Shoulder Length | 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.308 INCHES MINIMUM AND 0.310 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.438 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.419 INCHES MINIMUM AND 0.438 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 |
|---|---|
| AES14C312250SL9LN | 3/2 Design control — primary reference U.S. Government activity |
| ASTM A574 | 5/1 Secondary reference U.S. Government activity |
NSN 5305-01-516-1958 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5305-01-548-2490. Verify interchangeability with system specifications before substitution.
Key specifications for 5305-01-516-1958: Width Across Flats: 0.156 INCHES NOMINAL IN; Head Height: 0.209 INCHES MINIMUM AND 0.219 INCHES MAXIMUM IN; Fastener Length: 0.683 INCHES MINIMUM AND 0.693 INCHES MAXIMUM IN; Shoulder Length: 0.245 INCHES MINIMUM AND 0.255 INCHES MAXIMUM 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.