The Screw,shoulder, cataloged under National Stock Number 5305-01-323-7943, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-323-7943 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.182 INCHES NOMINAL IN |
| Fastener Length | 2.035 INCHES MINIMUM AND 2.065 INCHES MAXIMUM IN |
| Shoulder Length | 1.579 INCHES MINIMUM AND 1.609 INCHES MAXIMUM FIRST SHOULDER IN |
| Surface Treatment Document and Classification | QQ-P-416,TY II,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL |
| Shoulder Diameter | 0.4516 INCHES MINIMUM AND 0.4526 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.456 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | MIL-S-5626 MIL STD SINGLE MATERIAL RESPONSE OR MIL-S-5000 MIL STD SINGLE MATERIAL RESPONSE OR MIL-S-6049 MIL STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.4375 INCHES IN |
| Head Style | FLAT COUNTERSUNK UNDERCUT |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1707 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Surface Treatment | CADMIUM OVERALL |
| Minimum Tensile Strength | 160000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | HIGH-TORQUE |
| Countersink Angle | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 4140 OR STEEL COMP 4340 OR STEEL COMP 8740 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Head Diameter | 0.8884 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 |
|---|---|
| NAS1707-15 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-323-7943 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-323-7943: Head Height: 0.182 INCHES NOMINAL IN; Fastener Length: 2.035 INCHES MINIMUM AND 2.065 INCHES MAXIMUM IN; Shoulder Length: 1.579 INCHES MINIMUM AND 1.609 INCHES MAXIMUM FIRST SHOULDER IN; Surface Treatment Document and Classification: QQ-P-416,TY II,CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL. 21 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.