The Screw,assembled Washer, cataloged under National Stock Number 5305-00-608-7789, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 24 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-00-608-7789 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.072 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN |
| Fastener Length | 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Secondary Washer Relationship to Primary Washer | NOT IDENTICAL |
| Primary Washer Outside Diameter | 0.253 INCHES MAXIMUM IN |
| Thread Length | 0.252 INCHES MINIMUM AND 0.282 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-W-321 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Secondary Washer Style | FLAT |
| Nominal Thread Diameter | 0.138 INCHES IN |
| Head Style | PAN NO. 2 |
| Primary Washer Style | SPLIT HELICAL RING |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.093 INCHES MAXIMUM IN |
| Specification/standard Data | 80205-NAS720 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Secondary Washer Outside Diameter | 0.263 INCHES MAXIMUM IN |
| Surface Treatment | TIN OVERALL |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Secondary Washer Material Thickness | 0.019 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 32 |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 2 |
| Head Diameter | 0.256 INCHES MINIMUM AND 0.270 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 |
| Reference | Meaning |
|---|---|
| NAS720B6-6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-00-608-7789 is a Screw,assembled Washer, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-00-608-7789: Head Height: 0.072 INCHES MINIMUM AND 0.082 INCHES MAXIMUM IN; Fastener Length: 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Secondary Washer Relationship to Primary Washer: NOT IDENTICAL; Primary Washer Outside Diameter: 0.253 INCHES MAXIMUM IN. 24 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.