The Screw,shoulder, cataloged under National Stock Number 5305-01-620-1238, 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17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-620-1238 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Width Across Flats | 9.5 MILLIMETERS NOMINAL MM |
| Head Height | 5.1 MILLIMETERS NOMINAL MM |
| Fastener Length | 61.6 MILLIMETERS NOMINAL MM |
| Shoulder Length | 36.2 MILLIMETERS NOMINAL FIRST SHOULDER MM |
| Shoulder Diameter | 19.0 MILLIMETERS NOMINAL ALL SHOULDERS MM |
| Thread Length | 21.4 MILLIMETERS NOMINAL MM |
| Shoulder Shape | ROUND ALL SHOULDERS |
| Material Document and Classification | ASTM A276 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | PAN NO. 2 |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | SQUARE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | STEEL COMP 304 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 28.7 MILLIMETERS NOMINAL MM |
| 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 |
|---|---|
| 715616-3 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-620-1238 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-620-1238: Width Across Flats: 9.5 MILLIMETERS NOMINAL MM; Head Height: 5.1 MILLIMETERS NOMINAL MM; Fastener Length: 61.6 MILLIMETERS NOMINAL MM; Shoulder Length: 36.2 MILLIMETERS NOMINAL FIRST SHOULDER MM. 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.