The Screw,assembled Washer, cataloged under National Stock Number 5305-01-159-9391, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Raytheon Company Div Rmd Strategic. Government technical data includes 29 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-159-9391 |
| Primary Part Number | 4177217-3 |
| Item Name | Screw,assembled Washer |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Raytheon Company Div Rmd Strategic |
| Status | ACTIVE |
| Head Height | 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN |
| Fastener Length | 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Secondary Washer Relationship to Primary Washer | NOT IDENTICAL |
| Surface Treatment Document and Classification | QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| Primary Washer Outside Diameter | 0.209 INCHES MAXIMUM IN |
| Thread Length | 0.293 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-B-613 FED SPEC ALL MATERIAL RESPONSES SECONDARY WASHER |
| Material Document and Classification | QQ-B-613 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE FASTENER |
| Material Document and Classification | QQ-B-750 FED SPEC SINGLE MATERIAL RESPONSE PRIMARY WASHER |
| Secondary Washer Style | FLAT |
| Nominal Thread Diameter | 0.112 INCHES IN |
| Head Style | PAN NO. 2 |
| Primary Washer Style | SPLIT HELICAL RING |
| Thread Direction | RIGHT-HAND |
| Primary Washer Material Thickness | 0.025 INCHES MINIMUM AND 0.031 INCHES MAXIMUM IN |
| Specification/standard Data | 80205-NAS720 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Secondary Washer Outside Diameter | 0.213 INCHES MINIMUM AND 0.223 INCHES MAXIMUM IN |
| Surface Treatment | NICKEL OVERALL |
| Minimum Tensile Strength | 55000 POUNDS PER SQUARE INCH LBS |
| Internal Drive Style | SLOT |
| Thread Class | 2A A |
| Secondary Washer Material Thickness | 0.013 INCHES MINIMUM AND 0.019 INCHES MAXIMUM IN |
| Thread Quantity Per Inch | 40 |
| Material | COPPER ALLOY FASTENER |
| Material | COPPER ALLOY 260 OR COPPER ALLOY 268 SECONDARY WASHER |
| Material | COPPER ALLOY 510 PRIMARY WASHER |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Washer Quantity | 2 |
| Head Diameter | 0.205 INCHES MINIMUM AND 0.219 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 |
|---|---|
| 4177217-3 | Raytheon Company Div Rmd Strategic (USA) |
| Reference | Meaning |
|---|---|
| NAS720B4-6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-159-9391 is a Screw,assembled Washer, manufactured by Raytheon Company Div Rmd Strategic, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-159-9391 has 1 manufacturer part number on file: 4177217-3 (Raytheon Company Div Rmd Strategic).
Key specifications for 4177217-3: Head Height: 0.058 INCHES MINIMUM AND 0.068 INCHES MAXIMUM IN; Fastener Length: 0.343 INCHES MINIMUM AND 0.375 INCHES MAXIMUM IN; Secondary Washer Relationship to Primary Washer: NOT IDENTICAL; Surface Treatment Document and Classification: QQ-N-290 FED SPEC SINGLE TREATMENT RESPONSE OVERALL. 29 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.