The Clamp,hub, cataloged under National Stock Number 3040-00-973-1505, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Spencer Industries Inc. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 3040-00-973-1505 |
| Primary Part Number | SM-B-447575 |
| Item Name | Clamp,hub |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | Spencer Industries Inc |
| 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 | FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI B1112, 1212 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1112 ASSN STD SINGLE MATERIAL RESPONSE |
| Distance From Bore Centerline to End | 0.289 INCHES NOMINAL IN |
| Nominal Thread Size | 0.112 INCHES IN |
| Screw Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Surface Treatment | NICKEL |
| Bore Diameter | 0.2270 INCHES MINIMUM AND 0.2290 INCHES MAXIMUM IN |
| Material | STEEL COMP B1112 OR STEEL COMP 1212 |
| 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 |
|---|---|
| SM-B-447575 | Spencer Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| SM-B-447575 | 3/2 Design control — primary reference U.S. Government activity |
NSN 3040-00-973-1505 is a Clamp,hub, manufactured by Spencer Industries Inc, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-973-1505 has 1 manufacturer part number on file: SM-B-447575 (Spencer Industries Inc).
Key specifications for SM-B-447575: Plain Hole Diameter: 0.1200 INCHES NOMINAL IN; Clamp Securing Hole Style: THREADED; Style Designator: RECTANGULAR, SINGLE BOLT SECURED; Material Document and Classification: FED STD 66 FED STD SINGLE MATERIAL RESPONSE OR AISI B1112, 1212 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1112 ASSN STD 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.