The Thumbscrew, cataloged under National Stock Number 5305-01-587-9106, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Accurate Screw Machine Co. Government technical data includes 12 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-587-9106 |
| Primary Part Number | 18012SS-12A |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Accurate Screw Machine Co |
| Status | ACTIVE |
| Head Height | 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN |
| Thread Length | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | KNURLED NO. 2 |
| Thread Direction | RIGHT-HAND |
| Surface Treatment | PASSIVATE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 32 |
| Material | STEEL OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.438 INCHES MINIMUM AND 0.458 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 |
|---|---|
| 18012SS-12A PRIMARY | Accurate Screw Machine Co (USA) |
NSN 5305-01-587-9106 is a Thumbscrew, manufactured by Accurate Screw Machine Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-587-9106 has 1 manufacturer part number on file: 18012SS-12A (Accurate Screw Machine Co).
Key specifications for 18012SS-12A: Head Height: 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 0.673 INCHES MINIMUM AND 0.703 INCHES MAXIMUM IN; Thread Length: 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM IN; Nominal Thread Diameter: 0.164 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.