The Shaft and Ratchet Assembly, cataloged under National Stock Number 3020-00-752-1157, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) 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 1 specification, 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-00-752-1157 |
| Primary Part Number | 7521157 |
| Item Name | Shaft and Ratchet Assembly |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | MATERIAL,BRONZE;21.125 IN.0/A LG,8.125 IN.SHAFTEND TO RATCHET WHEEL;SHAFT PN 8352668,RATCHET WHEEL 8352660 IAW DWG NO.7521157 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 |
|---|---|
| 7521157 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| 251W4 | 5/9 Secondary reference Diamond Reo Truck Co |
| 54-43 | 3/2 Design control — primary reference U.S. Government activity |
| 2510007521157 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 3020-00-752-1157 is a Shaft and Ratchet Assembly, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-00-752-1157 has 1 manufacturer part number on file: 7521157 (U S Army Tank Automotive Command Amsta-Im-Mm).
3 possible matches (shared part number, not a government interchangeability claim): 6665-01-315-4775, 4730-01-479-8274, 6150-01-548-8097. Verify interchangeability with system specifications before substitution.
Key specifications for 7521157: General Characteristics Item Description: MATERIAL,BRONZE;21.125 IN.0/A LG,8.125 IN.SHAFTEND TO RATCHET WHEEL;SHAFT PN 8352668,RATCHET WHEEL 8352660 IAW DWG NO.7521157 IN. 1 specification is 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.