The Thumbscrew, cataloged under National Stock Number 5305-01-376-2920, 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 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-376-2920 |
| Primary Part Number | CTS230A-11 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.437 INCHES NOMINAL IN |
| Point Length | 0.313 INCHES NOMINAL IN |
| Fastener Length | 2.625 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | MIL-C-13924A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A |
| Thread Length | 2.438 INCHES NOMINAL IN |
| Nominal Thread Diameter | 0.375 INCHES IN |
| Head Style | KNURLED NO. 1 |
| Thread Direction | RIGHT-HAND |
| Point Style | BALL |
| Color | BLACK OVERALL |
| Surface Treatment | OXIDE OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 16 |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Head Diameter | 1.250 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 |
|---|---|
| CTS230A-11 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5305-01-376-2920 is a Thumbscrew, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-376-2920 has 1 manufacturer part number on file: CTS230A-11 (The Boeing Company Div Defense).
Key specifications for CTS230A-11: Head Height: 0.437 INCHES NOMINAL IN; Point Length: 0.313 INCHES NOMINAL IN; Fastener Length: 2.625 INCHES NOMINAL IN; Surface Treatment Document and Classification: MIL-C-13924A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A. 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.