The Thumbscrew, cataloged under National Stock Number 5305-01-347-9728, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Derbyshire Machine & Tool Co. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Thumbscrew |
| FSC / FSG | 5305 — Screws (FSG 53) |
| Manufacturers | Derbyshire Machine & Tool Co (CAGE 71905); Naval Sea Systems Command (CAGE 53711) |
| Parameter | Value |
|---|---|
| NSN | 5305-01-347-9728 |
| Primary Part Number | 845-6556172 ITEM 18 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Derbyshire Machine & Tool Co |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| 845-6556172 ITEM 18 PRIMARY | Derbyshire Machine & Tool Co (USA) |
| 845-6556172 ITEM 18 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 845-6556172 ITEM 18 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-347-9728 is a Thumbscrew, manufactured by Derbyshire Machine & Tool Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-347-9728 has 2 manufacturer part numbers on file: 845-6556172 ITEM 18 (Derbyshire Machine & Tool Co), 845-6556172 ITEM 18 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-348-4213. Verify interchangeability with system specifications before substitution.
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.