The Screw,shoulder, cataloged under National Stock Number 5305-01-418-3437, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 19 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-418-3437 |
| Primary Part Number | 566-6404315-12 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 3.250 INCHES NOMINAL IN |
| Shoulder Length | 0.060 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Length | 0.254 INCHES NOMINAL THIRD SHOULDER IN |
| Shoulder Length | 1.876 INCHES NOMINAL SECOND SHOULDER IN |
| Shoulder Diameter | 0.742 INCHES MINIMUM AND 0.755 INCHES MAXIMUM THIRD SHOULDER IN |
| Shoulder Diameter | 0.940 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.995 INCHES MINIMUM AND 0.988 INCHES MAXIMUM SECOND SHOULDER IN |
| Thread Length | 1.060 INCHES NOMINAL IN |
| Shoulder Shape | ROUND ALL SHOULDERS |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | HEXAGON |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 4.500 INCHES NOMINAL IN |
| Internal Drive Style | W/O INTERNAL DRIVE |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 11 |
| Material | NICKEL ALLOY K-500 OR NICKEL ALLOY 502 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 566-6404315-12 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5305-01-418-3437 is a Screw,shoulder, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-418-3437 has 1 manufacturer part number on file: 566-6404315-12 (Naval Sea Systems Command).
Key specifications for 566-6404315-12: Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 3.250 INCHES NOMINAL IN; Shoulder Length: 0.060 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Length: 0.254 INCHES NOMINAL THIRD SHOULDER IN. 19 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.