The Thumbscrew, cataloged under National Stock Number 5305-01-074-8929, is classified within Federal Supply Class 5305 (Screws) of the Hardware and Abrasives group. The manufacturer of record is Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5305-01-074-8929 |
| Primary Part Number | 12273976-1 |
| Item Name | Thumbscrew |
| FSC / FSG | 5305 / 53 — Screws |
| Manufacturer | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate |
| Status | ACTIVE |
| Head Height | 2.380 INCHES NOMINAL IN |
| Fastener Length | 4.000 INCHES NOMINAL IN |
| Shoulder Length | 0.312 INCHES NOMINAL FIRST SHOULDER IN |
| Surface Treatment Document and Classification | MIL-E-52798A MIL SPEC 1ST TREATMENT RESPONSE OR MIL-E-52835 MIL SPEC 2ND TREATMENT RESPONSE OVERALL A |
| Thread Length | 1.261 INCHES NOMINAL IN |
| Shoulder Shape | HEXAGONAL FIRST SHOULDER |
| Material Document and Classification | ASTM A576 ASSN STD 1ST MATERIAL RESPONSE OR ASTM A108 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Nominal Thread Diameter | 0.500 INCHES IN |
| Head Style | KNURLED NO. 4 |
| Thread Direction | RIGHT-HAND |
| Point Style | OVAL |
| Surface Treatment | ENAMEL OVERALL |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 13 |
| Material | STEEL COMP 1015 OR STEEL COMP 1025 OVERALL |
| 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 |
|---|---|
| 12273976-1 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| 12273976 PRIMARY | Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate (USA) |
| Reference | Meaning |
|---|---|
| 5305010748929 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
NSN 5305-01-074-8929 is a Thumbscrew, manufactured by Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate, classified under FSC 5305, Screws. Status: active.
NSN 5305-01-074-8929 has 2 manufacturer part numbers on file: 12273976-1 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate), 12273976 (Combat Capabilities Development Command (ccdc) Armaments Center Dba Ccdc Div Logistics Research and Engineering Directorate).
1 possible match (shared part number, not a government interchangeability claim): 5305-01-518-5372. Verify interchangeability with system specifications before substitution.
Key specifications for 12273976-1: Head Height: 2.380 INCHES NOMINAL IN; Fastener Length: 4.000 INCHES NOMINAL IN; Shoulder Length: 0.312 INCHES NOMINAL FIRST SHOULDER IN; Surface Treatment Document and Classification: MIL-E-52798A MIL SPEC 1ST TREATMENT RESPONSE OR MIL-E-52835 MIL SPEC 2ND TREATMENT RESPONSE OVERALL A. 17 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.