The Thumbscrew, cataloged under National Stock Number 5305-01-170-4565, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 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 | 5305-01-170-4565 |
| Primary Part Number | 74D291037-2059 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.500 INCHES NOMINAL IN |
| Fastener Length | 1.600 INCHES NOMINAL IN |
| Shoulder Length | 0.350 INCHES NOMINAL FIRST SHOULDER IN |
| Shoulder Diameter | 0.610 INCHES NOMINAL FIRST SHOULDER IN |
| Thread Length | 0.600 INCHES NOMINAL IN |
| Shoulder Shape | ROUND FIRST SHOULDER |
| Material Document and Classification | AMS 4640 ALLOY 630 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | KNURLED NO. 4 |
| Thread Direction | RIGHT-HAND |
| Point Style | FULL DOG |
| Thread Class | 3A A |
| Thread Quantity Per Inch | 28 |
| Material | COPPER OVERALL |
| Thread Series Designator | UNEF |
| Head Diameter | 0.312 INCHES MINIMUM AND 0.316 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 |
|---|---|
| 74D291037-2059 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5305-01-170-4565 is a Thumbscrew, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-170-4565 has 1 manufacturer part number on file: 74D291037-2059 (The Boeing Company Div Defense).
Key specifications for 74D291037-2059: Head Height: 0.500 INCHES NOMINAL IN; Fastener Length: 1.600 INCHES NOMINAL IN; Shoulder Length: 0.350 INCHES NOMINAL FIRST SHOULDER IN; Shoulder Diameter: 0.610 INCHES NOMINAL FIRST SHOULDER IN. 16 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.