The Synchronizer,transmission, cataloged under National Stock Number 2520-00-752-1023, is classified within Federal Supply Class 2520 (Vehicular Power Transmission Components) of the Vehicular Equipment Components 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2520-00-752-1023 |
| Primary Part Number | 7521023 |
| Item Name | Synchronizer,transmission |
| FSC / FSG | 2520 / 25 — Vehicular Power Transmission Components |
| Manufacturer | U S Army Tank Automotive Command Amsta-Im-Mm |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL ALLOY QQ-S-624 8620;ROCKWELL C59-62;5.248 IN. DIA;2.573 IN. LG O/A;INTERNAL INVOLUTE SPLINES,19 TEETH,20 DEG PRESSURE ANGLE,2.7143 PITCH DIA IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 7521023 PRIMARY | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| Reference | Meaning |
|---|---|
| SP7735X | 5/9 Secondary reference T and J Industries Inc |
| 7735X | 5/2 Secondary reference U.S. Government activity |
| 2348T2 | 5/9 Secondary reference Spalla Inc |
| 2348T2 | 5/9 Secondary reference Diamond Reo Truck Co |
| 914101 | 5/9 Secondary reference Sasco Inc Canadian Div |
| 2520007521023 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
NSN 2520-00-752-1023 is a Synchronizer,transmission, manufactured by U S Army Tank Automotive Command Amsta-Im-Mm, classified under FSC 2520, Vehicular Power Transmission Components. Status: active.
NSN 2520-00-752-1023 has 1 manufacturer part number on file: 7521023 (U S Army Tank Automotive Command Amsta-Im-Mm).
1 possible match (shared part number, not a government interchangeability claim): 4720-01-715-0277. Verify interchangeability with system specifications before substitution.
Key specifications for 7521023: General Characteristics Item Description: STEEL ALLOY QQ-S-624 8620;ROCKWELL C59-62;5.248 IN. DIA;2.573 IN. LG O/A;INTERNAL INVOLUTE SPLINES,19 TEETH,20 DEG PRESSURE ANGLE,2.7143 PITCH DIA IN. 1 specification is documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). 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.