The Screw,machine, cataloged under National Stock Number 5305-01-261-0666, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-261-0666 |
| Item Name | Screw,machine |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Fastener Length | 1.948 INCHES MINIMUM AND 1.978 INCHES MAXIMUM IN |
| Screw Material Document and Classification | QQ-P-416,TY 2 CL 3 FED SPEC SINGLE MATERIAL RESPONSE |
| Thread Length | 0.338 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.190 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Specification/standard Data | 80205-NAS1221 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| Screw Material | ALUMINUM |
| Internal Drive Style | CROSS RECESS TYPE 1 |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| 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 |
|---|---|
| NAS1221-3E26P | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-261-0666 is a Screw,machine, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-261-0666: Fastener Length: 1.948 INCHES MINIMUM AND 1.978 INCHES MAXIMUM IN; Screw Material Document and Classification: QQ-P-416,TY 2 CL 3 FED SPEC SINGLE MATERIAL RESPONSE; Thread Length: 0.338 INCHES NOMINAL IN; Nominal Thread Diameter: 0.190 INCHES 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.