The Clamp,hub, cataloged under National Stock Number 3040-00-070-2338, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-070-2338 |
| Item Name | Clamp,hub |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Status | ACTIVE |
| Plain Hole Diameter | 0.1250 INCHES NOMINAL IN |
| Clamp Securing Hole Style | THREADED |
| Style Designator | ROUND, SINGLE BOLT SECURED |
| Material Document and Classification | QQ-S-764, TYPE 303, COND A-CANCELED FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-763, CLASS 304, COND A FED SPEC 2ND MATERIAL RESPONSE |
| Outside Diameter | 0.812 INCHES NOMINAL IN |
| Nominal Thread Size | 0.112 INCHES IN |
| Screw Thread Series Designator | UN |
| Surface Treatment | PASSIVATE |
| Thread Quantity Per Inch | 40 |
| Bore Diameter | 0.2500 INCHES NOMINAL IN |
| Material | STEEL COMP 303 AND STEEL COMP 304 |
| Thickness | 0.203 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 |
| Reference | Meaning |
|---|---|
| SMC587426-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-070-2338 is a Clamp,hub, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
Key specifications for 3040-00-070-2338: Plain Hole Diameter: 0.1250 INCHES NOMINAL IN; Clamp Securing Hole Style: THREADED; Style Designator: ROUND, SINGLE BOLT SECURED; Material Document and Classification: QQ-S-764, TYPE 303, COND A-CANCELED FED SPEC 1ST MATERIAL RESPONSE AND QQ-S-763, CLASS 304, COND A FED SPEC 2ND MATERIAL RESPONSE. 12 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.