The Screw,shoulder, cataloged under National Stock Number 5305-00-407-7773, 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18 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-407-7773 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.094 INCHES NOMINAL IN |
| Fastener Length | 0.782 INCHES NOMINAL IN |
| Shoulder Length | 0.234 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.308 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.548 INCHES MINIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Shank Unthreaded Hole Diameter | 0.067 INCHES NOMINAL FIRST HOLE IN |
| Material Document and Classification | QQ-S-630-CANC FED SPEC 1ST MATERIAL RESPONSE OR QQ-S-631 FED SPEC 2ND MATERIAL RESPONSE OR QQ-S-634 FED SPEC 3RD MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT CHAMFER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 28 |
| Material | STEEL COMP 1020 OVERALL |
| Thread Series Designator | UNF |
| Distance From Head Largest Bearing Surface to Shank Hole Center | 0.671 INCHES NOMINAL FIRST HOLE IN |
| Head Diameter | 0.373 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 |
|---|---|
| SCD1645ITEM28 | 3/1 Design control — primary reference U.S. Government activity |
| SCD1645GITEM29 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-407-7773 is a Screw,shoulder, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-407-7773: Head Height: 0.094 INCHES NOMINAL IN; Fastener Length: 0.782 INCHES NOMINAL IN; Shoulder Length: 0.234 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.308 INCHES NOMINAL 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.