The Screw,assembled Washer, cataloged under National Stock Number 5305-01-445-5103, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Allied Defense Industries, Llc Dba Ams Distribution. Government technical data includes 14 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-445-5103 |
| Primary Part Number | YT329761 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Allied Defense Industries, Llc Dba Ams Distribution |
| Status | ACTIVE |
| Head Height | 0.216 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN |
| Fastener Length | 0.470 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN |
| Primary Washer Outside Diameter | 0.513 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | HEXAGON EXTENDED WASHER |
| Primary Washer Style | COUNTERSINK EXTERNAL TEETH |
| Thread Direction | RIGHT-HAND |
| Width Between Flats | 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Surface Treatment | ZINC OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 1 |
| 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 |
|---|---|
| YT329761 PRIMARY | Allied Defense Industries, Llc Dba Ams Distribution (USA) |
| YT329761 | General Dynamics Land Systems Australia Pty Ltd 50 Mawson Lakes Boulevard (AUS) |
| Reference | Meaning |
|---|---|
| 329761 | 3/9 Design control — primary reference Young Touchstone Company Div Young Touchstone |
NSN 5305-01-445-5103 is a Screw,assembled Washer, manufactured by Allied Defense Industries, Llc Dba Ams Distribution, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-445-5103 has 2 manufacturer part numbers on file: YT329761 (Allied Defense Industries, Llc Dba Ams Distribution), YT329761 (General Dynamics Land Systems Australia Pty Ltd 50 Mawson Lakes Boulevard).
Key specifications for YT329761: Head Height: 0.216 INCHES MINIMUM AND 0.240 INCHES MAXIMUM IN; Fastener Length: 0.470 INCHES MINIMUM AND 0.520 INCHES MAXIMUM IN; Primary Washer Outside Diameter: 0.513 INCHES MINIMUM AND 0.531 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.250 INCHES IN. 14 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.