The Thumbscrew, cataloged under National Stock Number 5305-01-285-9486, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. Government technical data includes 15 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-285-9486 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Status | ACTIVE |
| Head Height | 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN |
| Fastener Length | 2.045 INCHES MINIMUM AND 2.055 INCHES MAXIMUM IN |
| Shoulder Length | 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM FIRST SHOULDER IN |
| Shoulder Diameter | 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM FIRST SHOULDER IN |
| Thread Length | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Nominal Thread Diameter | 0.250 INCHES IN |
| Head Style | THUMB NO. 4 |
| Thread Direction | RIGHT-HAND |
| Point Style | POINTLESS |
| Width Between Flats | 1.110 INCHES MINIMUM AND 1.130 INCHES MAXIMUM IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 20 |
| Material | STEEL COMP 303 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| SC-C-884728 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-285-9486 is a Thumbscrew, classified under FSC 5305, Screws. Status: active.
Key specifications for 5305-01-285-9486: Head Height: 0.610 INCHES MINIMUM AND 0.630 INCHES MAXIMUM IN; Fastener Length: 2.045 INCHES MINIMUM AND 2.055 INCHES MAXIMUM IN; Shoulder Length: 0.110 INCHES MINIMUM AND 0.130 INCHES MAXIMUM FIRST SHOULDER IN; Shoulder Diameter: 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM FIRST SHOULDER IN. 15 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.