The Thumbscrew, cataloged under National Stock Number 5305-01-133-0166, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Keuffel and Esser 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-133-0166 |
| Primary Part Number | A46220 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Keuffel and Esser Co |
| Status | ACTIVE |
| Head Height | 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN |
| Fastener Length | 1.094 INCHES MINIMUM AND 1.156 INCHES MAXIMUM IN |
| Thread Length | 0.344 INCHES MINIMUM AND 0.406 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.164 INCHES IN |
| Head Style | KNURLED NO. 4 |
| Thread Direction | RIGHT-HAND |
| Point Style | FLAT |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 32 |
| Material | COPPER ALLOY OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 0.469 INCHES MINIMUM AND 0.531 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 |
|---|---|
| A46220 PRIMARY | Keuffel and Esser Co (USA) |
| Reference | Meaning |
|---|---|
| A46220 | 3/9 Design control — primary reference Brunson Instrument Company Dba Brunson Instrument Company |
NSN 5305-01-133-0166 is a Thumbscrew, manufactured by Keuffel and Esser Co, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-133-0166 has 1 manufacturer part number on file: A46220 (Keuffel and Esser Co).
Key specifications for A46220: Head Height: 0.173 INCHES MINIMUM AND 0.203 INCHES MAXIMUM IN; Fastener Length: 1.094 INCHES MINIMUM AND 1.156 INCHES MAXIMUM IN; Thread Length: 0.344 INCHES MINIMUM AND 0.406 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.