The Screw,shoulder, cataloged under National Stock Number 5305-01-397-5943, 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 18 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-397-5943 |
| Primary Part Number | 211017080 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Extended Washer Thickness | 0.030 INCHES NOMINAL IN |
| Head Height | 0.380 INCHES NOMINAL IN |
| Fastener Length | 2.530 INCHES NOMINAL IN |
| Shoulder Length | 1.583 INCHES NOMINAL FIRST SHOULDER IN |
| Extended Washer Diameter | 1.120 INCHES NOMINAL IN |
| Shoulder Diameter | 0.745 INCHES MINIMUM AND 0.748 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.890 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.625 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 1.125 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 |
|---|---|
| 211017080 PRIMARY | Naval Sea Systems Command (USA) |
| 566-6404315-8 | Naval Sea Systems Command (USA) |
NSN 5305-01-397-5943 is a Screw,shoulder, manufactured by Naval Sea Systems Command, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-397-5943 has 2 manufacturer part numbers on file: 211017080 (Naval Sea Systems Command), 566-6404315-8 (Naval Sea Systems Command).
Key specifications for 211017080: Extended Washer Thickness: 0.030 INCHES NOMINAL IN; Head Height: 0.380 INCHES NOMINAL IN; Fastener Length: 2.530 INCHES NOMINAL IN; Shoulder Length: 1.583 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.