The Screw,assembled Washer, cataloged under National Stock Number 5305-00-285-5262, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-285-5262 |
| Primary Part Number | 191983 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Fastener Length | 0.625 INCHES NOMINAL IN |
| Primary Washer Outside Diameter | 0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN |
| Thread Length | 0.472 INCHES MINIMUM IN |
| Material Document and Classification | ASTM A108 ASSN STD ALL MATERIAL RESPONSES OVERALL |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | FLAT COUNTERSUNK |
| Primary Washer Style | COUNTERSINK EXTERNAL TEETH |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM IN |
| Surface Treatment | CADMIUM OR ZINC OVERALL |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Countersink Angle | 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 1 |
| Head Diameter | 0.477 INCHES MINIMUM AND 0.507 INCHES MAXIMUM 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 |
|---|---|
| 191983 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
NSN 5305-00-285-5262 is a Screw,assembled Washer, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 5305, Screws. Status: active.
NSN 5305-00-285-5262 has 1 manufacturer part number on file: 191983 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 9905-01-067-6519. Verify interchangeability with system specifications before substitution.
Key specifications for 191983: Fastener Length: 0.625 INCHES NOMINAL IN; Primary Washer Outside Diameter: 0.270 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN; Thread Length: 0.472 INCHES MINIMUM IN; Material Document and Classification: ASTM A108 ASSN STD ALL MATERIAL RESPONSES 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.