The Hub,body, cataloged under National Stock Number 3040-00-421-3928, 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 9 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3040-00-421-3928 |
| Primary Part Number | 7979324 |
| Item Name | Hub,body |
| FSC / FSG | 3040 / 30 — Miscellaneous Power Transmission Equipment |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| Second End Hub Outside Diameter | 8.657 INCHES MINIMUM AND 8.660 INCHES MAXIMUM IN |
| Shoulder Width | 1.311 INCHES MINIMUM AND 1.316 INCHES MAXIMUM IN |
| Hub Inside Diameter | 5.250 INCHES NOMINAL IN |
| Material Document and Classification | UNS F22200 FED SPEC SINGLE MATERIAL RESPONSE |
| Distance From First End Hub to Shoulder | 6.688 INCHES NOMINAL IN |
| Material | IRON CAST |
| Distance From Second End Hub to Shoulder | 0.563 INCHES NOMINAL IN |
| Shoulder Outside Diameter | 13.750 INCHES NOMINAL IN |
| First End Hub Outside Diameter | 8.500 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 |
|---|---|
| 7979324 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 3040-00-421-3928 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 3040004213928 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 3040-00-421-3928 is a Hub,body, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3040, Miscellaneous Power Transmission Equipment. Status: active.
NSN 3040-00-421-3928 has 1 manufacturer part number on file: 7979324 (U S Army Tank Automotive Command Amsta-Im-Mm).
Key specifications for 7979324: Second End Hub Outside Diameter: 8.657 INCHES MINIMUM AND 8.660 INCHES MAXIMUM IN; Shoulder Width: 1.311 INCHES MINIMUM AND 1.316 INCHES MAXIMUM IN; Hub Inside Diameter: 5.250 INCHES NOMINAL IN; Material Document and Classification: UNS F22200 FED SPEC SINGLE MATERIAL RESPONSE. 9 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.