The Screw,shoulder, cataloged under National Stock Number 5305-01-478-3697, 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17 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-478-3697 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fastener Length | 1.853 INCHES MINIMUM AND 1.883 INCHES MAXIMUM IN |
| Shoulder Length | 1.465 INCHES NOMINAL GRIP IN |
| Shoulder Diameter | 0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM GRIP IN |
| Thread Length | 0.403 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Minimum Tensile Strength | 5790 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | OFFSET CRUCIFORM (TORQUE SET) |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 4140 OR STEEL COMP 4340 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.464 INCHES NOMINAL 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 |
|---|---|
| NAS1580A4T17X | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-478-3697 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-478-3697: Fastener Length: 1.853 INCHES MINIMUM AND 1.883 INCHES MAXIMUM IN; Shoulder Length: 1.465 INCHES NOMINAL GRIP IN; Shoulder Diameter: 0.2646 INCHES MINIMUM AND 0.2651 INCHES MAXIMUM GRIP IN; Thread Length: 0.403 INCHES NOMINAL 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.