The Clamp,hub, cataloged under National Stock Number 3040-00-771-7656, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is General Dynamics Mission Systems, Inc. Dba Gdms. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-771-7656 |
| Primary Part Number | 42-21444B01 |
| Item Name | Clamp,hub |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | General Dynamics Mission Systems, Inc. Dba Gdms |
| Status | ACTIVE |
| Plain Hole Diameter | 0.1200 INCHES NOMINAL IN |
| Clamp Securing Hole Style | THREADED |
| Style Designator | RECTANGULAR, SINGLE BOLT SECURED |
| Material Document and Classification | QQ-S-764, TYPE 416-CANCELED FED SPEC SINGLE MATERIAL RESPONSE |
| Distance From Bore Centerline to End | 0.350 INCHES NOMINAL IN |
| Nominal Thread Size | 0.112 INCHES IN |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Surface Treatment | PASSIVATE |
| Bore Diameter | 0.3140 INCHES NOMINAL IN |
| Material | STEEL COMP 416 |
| Thickness | 0.187 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 |
|---|---|
| 42-21444B01 PRIMARY | General Dynamics Mission Systems, Inc. Dba Gdms (USA) |
| Reference | Meaning |
|---|---|
| 42-21444B01 | 5/9 Secondary reference U.S. Government activity |
NSN 3040-00-771-7656 is a Clamp,hub, manufactured by General Dynamics Mission Systems, Inc. Dba Gdms, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-771-7656 has 1 manufacturer part number on file: 42-21444B01 (General Dynamics Mission Systems, Inc. Dba Gdms).
Key specifications for 42-21444B01: Plain Hole Diameter: 0.1200 INCHES NOMINAL IN; Clamp Securing Hole Style: THREADED; Style Designator: RECTANGULAR, SINGLE BOLT SECURED; Material Document and Classification: QQ-S-764, TYPE 416-CANCELED FED SPEC SINGLE MATERIAL RESPONSE. 11 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.