The Ring,retaining, cataloged under National Stock Number 5325-00-281-2948, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Allison Transmission Inc Dba Allison Transmission, Inc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-281-2948 |
| Primary Part Number | 6764531 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Material Hardness Rating | 47.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| Material Document and Classification | QQ-S-631 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 0.528 INCHES MINIMUM AND 0.543 INCHES MAXIMUM IN |
| Major Thickness | 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL |
| Surface Treatment | ZINC OR CADMIUM |
| Material | STEEL |
| 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 |
|---|---|
| 6764531 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| 7725544 | U S Army Tank Automotive Command Amsta-Im-Mm (USA) |
| 583005 | Army Weapons Command Attn Amswe-Ree-S (USA) |
| Reference | Meaning |
|---|---|
| 50-50 | 3/1 Design control — primary reference U.S. Government activity |
NSN 5325-00-281-2948 is a Ring,retaining, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-281-2948 has 3 manufacturer part numbers on file: 6764531 (Allison Transmission Inc Dba Allison Transmission, Inc), 7725544 (U S Army Tank Automotive Command Amsta-Im-Mm), 583005 (Army Weapons Command Attn Amswe-Ree-S).
2 possible matches (shared part number, not a government interchangeability claim): 4820-00-289-1517, 4320-01-274-6018. Verify interchangeability with system specifications before substitution.
Key specifications for 6764531: Material Hardness Rating: 47.0 ROCKWELL C MINIMUM AND 56.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Material Document and Classification: QQ-S-631 FED SPEC SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR. 10 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.