The Screw,shoulder, cataloged under National Stock Number 5305-01-368-5646, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 17 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 | 5305-01-368-5646 |
| Primary Part Number | 1974AS178-001 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Head Height | 0.090 INCHES NOMINAL IN |
| Fastener Length | 0.280 INCHES NOMINAL IN |
| Shoulder Length | 0.075 INCHES NOMINAL ALL SHOULDERS IN |
| Surface Treatment Document and Classification | QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL |
| Thread Length | 0.145 INCHES NOMINAL IN |
| Shoulder Shape | SQUARE ALL SHOULDERS |
| Nominal Thread Diameter | 0.086 INCHES IN |
| Head Style | SQUARE |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.280 INCHES NOMINAL IN |
| Shoulder Width Across Flats | 0.020 INCHES NOMINAL ALL SHOULDERS IN |
| Surface Treatment | PASSIVATE OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 56 |
| Material | STEEL 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 |
|---|---|
| 1974AS178-001 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
NSN 5305-01-368-5646 is a Screw,shoulder, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-368-5646 has 1 manufacturer part number on file: 1974AS178-001 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
Key specifications for 1974AS178-001: Head Height: 0.090 INCHES NOMINAL IN; Fastener Length: 0.280 INCHES NOMINAL IN; Shoulder Length: 0.075 INCHES NOMINAL ALL SHOULDERS IN; Surface Treatment Document and Classification: QQ-P-35 FED SPEC 1ST TREATMENT RESPONSE OVERALL. 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.