The Thumbscrew, cataloged under National Stock Number 5305-01-376-3572, 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 14 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 | 5305-01-376-3572 |
| Primary Part Number | CTS230B-11-N |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Head Height | 0.375 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Fastener Length | 1.620 INCHES MINIMUM AND 1.830 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-C-13924A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A |
| Thread Length | 1.433 INCHES MINIMUM AND 1.643 INCHES MAXIMUM 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 | 1.000 INCHES MINIMUM AND 1.250 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 |
|---|---|
| CTS230B-11-N PRIMARY | The Boeing Company Div Defense (USA) |
NSN 5305-01-376-3572 is a Thumbscrew, manufactured by The Boeing Company Div Defense, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-376-3572 has 1 manufacturer part number on file: CTS230B-11-N (The Boeing Company Div Defense).
Key specifications for CTS230B-11-N: Head Height: 0.375 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN; Fastener Length: 1.620 INCHES MINIMUM AND 1.830 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-C-13924A MIL SPEC SINGLE TREATMENT RESPONSE OVERALL A; Thread Length: 1.433 INCHES MINIMUM AND 1.643 INCHES MAXIMUM IN. 14 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.