The Thumbscrew, cataloged under National Stock Number 5305-01-239-0639, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-239-0639 |
| Primary Part Number | 9M213B5-8 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Point Swivel Included Angle | 40.0 DEGREES NOMINAL |
| Point Diameter | 0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN |
| Head Height | 0.345 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN |
| Point Length | 0.392 INCHES MINIMUM AND 0.452 INCHES MAXIMUM IN |
| Fastener Length | 2.034 INCHES MINIMUM AND 2.154 INCHES MAXIMUM IN |
| Thread Length | 1.364 INCHES MINIMUM AND 1.604 INCHES MAXIMUM IN |
| Nominal Thread Diameter | 0.312 INCHES IN |
| Head Style | KNURLED NO. 4 |
| Thread Direction | RIGHT-HAND |
| Point Style | UNIVERSAL |
| Surface Treatment | CADMIUM OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 18 |
| Material | STEEL COMP 1020 OVERALL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.095 INCHES MINIMUM AND 1.155 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 |
|---|---|
| 9M213B5-8 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| CL-022-SHS-8 | 5/2 Secondary reference U.S. Government activity |
| CL-520-SHS-8 | 5/9 Secondary reference U.S. Government activity |
NSN 5305-01-239-0639 is a Thumbscrew, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-239-0639 has 1 manufacturer part number on file: 9M213B5-8 (The Boeing Company Div Defense).
Key specifications for 9M213B5-8: Point Swivel Included Angle: 40.0 DEGREES NOMINAL; Point Diameter: 0.470 INCHES MINIMUM AND 0.530 INCHES MAXIMUM IN; Head Height: 0.345 INCHES MINIMUM AND 0.405 INCHES MAXIMUM IN; Point Length: 0.392 INCHES MINIMUM AND 0.452 INCHES MAXIMUM 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.