The Ring,retaining, cataloged under National Stock Number 5325-00-282-1648, 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 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5325-00-282-1648 |
| Primary Part Number | 6726656-537 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Strength Rating | ERR-060 |
| Material Document and Classification | FED STD NO. 66,AISI C1070 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 5.566 INCHES NOMINAL IN |
| Major Thickness | 0.072 INCHES NOMINAL IN |
| Inside Diameter | 5.066 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPECIAL FLAT |
| 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 |
|---|---|
| 6726656-537 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
| Reference | Meaning |
|---|---|
| RR537 | 5/9 Secondary reference U.S. Government activity |
NSN 5325-00-282-1648 is a Ring,retaining, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-282-1648 has 1 manufacturer part number on file: 6726656-537 (Allison Transmission Inc Dba Allison Transmission, Inc).
Key specifications for 6726656-537: Usage Design: INTERNAL; Strength Rating: ERR-060; Material Document and Classification: FED STD NO. 66,AISI C1070 THRU C1090 FED STD SINGLE MATERIAL RESPONSE OR SAE1070 THRU 1090 ASSN STD SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: DOUBLE OVAL. 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.