The Thumbscrew, cataloged under National Stock Number 5305-01-593-2988, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Company. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-593-2988 |
| Primary Part Number | 92552A459 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Company |
| Status | ACTIVE |
| Head Height | 4.0 MILLIMETERS MINIMUM AND 6.0 MILLIMETERS MAXIMUM MM |
| External Thread Tolerance Class | 6H |
| Fastener Length | 19.0 MILLIMETERS MINIMUM AND 20.0 MILLIMETERS MAXIMUM MM |
| Thread Pitch in Millimeters | 1.0 |
| Thread Length | 19.0 MILLIMETERS MINIMUM AND 20.0 MILLIMETERS MAXIMUM MM |
| Hardness Rating | 84.0 ROCKWELL B MINIMUM OVERALL |
| Nominal Thread Diameter | 6.0 MILLIMETERS MM |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE OVERALL |
| Minimum Tensile Strength | 70000 POUNDS PER SQUARE INCH LBS |
| Material | STEEL OVERALL |
| Thread Series Designator | M |
| Head Diameter | 23.0 MILLIMETERS MINIMUM AND 25.0 MILLIMETERS MAXIMUM MM |
| 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 |
|---|---|
| 92552A459 PRIMARY | Mcmaster-Carr Supply Company (USA) |
| Reference | Meaning |
|---|---|
| 13022753 | 7/2 Vendor item drawing reference Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
NSN 5305-01-593-2988 is a Thumbscrew, manufactured by Mcmaster-Carr Supply Company, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-593-2988 has 1 manufacturer part number on file: 92552A459 (Mcmaster-Carr Supply Company).
Key specifications for 92552A459: Head Height: 4.0 MILLIMETERS MINIMUM AND 6.0 MILLIMETERS MAXIMUM MM; External Thread Tolerance Class: 6H; Fastener Length: 19.0 MILLIMETERS MINIMUM AND 20.0 MILLIMETERS MAXIMUM MM; Thread Pitch in Millimeters: 1.0. 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.