The Thumbscrew, cataloged under National Stock Number 5305-01-533-0588, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5305-01-533-0588 |
| Primary Part Number | 91185A666 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Head Height | 0.312 INCHES NOMINAL IN |
| Thread Length | 0.875 INCHES NOMINAL IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 20 |
| Material | PLASTIC ACETAL HEAD |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.750 INCHES NOMINAL 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 |
|---|---|
| 91185A666 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| 91185A666 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5305-01-533-0588 is a Thumbscrew, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-533-0588 has 1 manufacturer part number on file: 91185A666 (Mcmaster-Carr Supply Co).
Key specifications for 91185A666: Head Height: 0.312 INCHES NOMINAL IN; Thread Length: 0.875 INCHES NOMINAL IN; Head Style: KNURLED NO. 1; Thread Direction: RIGHT-HAND. 9 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.