The Clamp,hub, cataloged under National Stock Number 3040-00-618-1941, is classified within Federal Supply Class 3040 (Miscellaneous Power Transmission Equipment) of the Mechanical Power Transmission Equipment group. The manufacturer of record is U S Army Tank Automotive Command Amsta-Im-Mm. Government technical data includes 11 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-618-1941 |
| Primary Part Number | 6181941 |
| Item Name | Clamp,hub |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Surface Finish | 125 MICROINCHES BOTH BEARING FLATS |
| Plain Hole Diameter | 0.4530 INCHES NOMINAL IN |
| Clamp Securing Hole Style | THREADED |
| Style Designator | RECTANGULAR, SINGLE BOLT SECURED |
| Material Document and Classification | FED STD 66 FED STD 1ST MATERIAL RESPONSE OR AISI 1018 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1018 ASSN STD SINGLE MATERIAL RESPONSE AND FED STD 66 FED STD 2ND MATERIAL RESPONSE OR AISI 1020 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1020 ASSN STD SINGLE MATERIAL RESPONSE AND FED STD 66 FED STD 3RD MATERIAL RESPONSE OR AISI 1022 ASSN STD SINGLE MATERIAL RESPONSE OR SAE 1022 ASSN STD SINGLE MATERIAL RESPONSE |
| Distance From Bore Centerline to End | 1.031 INCHES NOMINAL IN |
| Nominal Thread Size | 0.438 INCHES IN |
| Screw Thread Series Designator | UNF |
| Bore Diameter | 1.1240 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN |
| Material | STEEL COMP 1018 OR STEEL COMP 1020 OR STEEL COMP 1022 |
| Thickness | 1.365 INCHES MINIMUM AND 1.375 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 |
|---|---|
| 6181941 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 89-354-8 PRIMARY | Dana Commercial Vehicle Manufacturing, Llc Dba Dana Commercial Vehicle Products (USA) |
| Reference | Meaning |
|---|---|
| 89-354-8 | 5/2 Secondary reference U.S. Government activity |
NSN 3040-00-618-1941 is a Clamp,hub, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-618-1941 has 2 manufacturer part numbers on file: 6181941 (U S Army Tank Automotive Command Amsta-Im-Mm), 89-354-8 (Dana Commercial Vehicle Manufacturing, Llc Dba Dana Commercial Vehicle Products).
Key specifications for 6181941: Surface Finish: 125 MICROINCHES BOTH BEARING FLATS; Plain Hole Diameter: 0.4530 INCHES NOMINAL IN; Clamp Securing Hole Style: THREADED; Style Designator: RECTANGULAR, SINGLE BOLT SECURED. 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.