The Screw,shoulder, cataloged under National Stock Number 5305-01-648-0408, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 12 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-648-0408 |
| Primary Part Number | 0421C10-8206-01 |
| Item Name | Screw,shoulder |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Width Across Flats | 0.090 INCHES NOMINAL IN |
| Head Height | 0.120 INCHES NOMINAL IN |
| Fastener Length | 0.360 INCHES NOMINAL IN |
| Thread Length | 0.180 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | FLAT FILLISTER |
| Thread Direction | RIGHT-HAND |
| Internal Drive Style | HEXAGON |
| Thread Quantity Per Inch | 32 |
| Material | STEEL COMP 316 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.280 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 |
| Part Number | Manufacturer |
|---|---|
| 0421C10-8206-01 PRIMARY | The Entwistle Company Llc (USA) |
| STR60253C03 PRIMARY | Accurate Manufactured Products Group Inc (USA) |
| 97345A443 | Mcmaster-Carr Supply Company (USA) |
NSN 5305-01-648-0408 is a Screw,shoulder, manufactured by The Entwistle Company Llc, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-648-0408 has 3 manufacturer part numbers on file: 0421C10-8206-01 (The Entwistle Company Llc), STR60253C03 (Accurate Manufactured Products Group Inc), 97345A443 (Mcmaster-Carr Supply Company).
Key specifications for 0421C10-8206-01: Width Across Flats: 0.090 INCHES NOMINAL IN; Head Height: 0.120 INCHES NOMINAL IN; Fastener Length: 0.360 INCHES NOMINAL IN; Thread Length: 0.180 INCHES NOMINAL IN. 12 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.