The Ring,retaining, cataloged under National Stock Number 5325-00-200-4160, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Rolls-Royce Corporation. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-00-200-4160 |
| Primary Part Number | 6781285 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Rolls-Royce Corporation |
| Status | ACTIVE |
| Material Hardness Rating | 32.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| End Style | D SHAPE ABOVE INSIDE PERIPHERY |
| Material Document and Classification | AMS 5621 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUNDED CORNERS |
| Outside Diameter | 0.675 INCHES MINIMUM AND 0.685 INCHES MAXIMUM IN |
| Major Thickness | 0.040 INCHES NOMINAL IN |
| Inside Diameter | 0.595 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Material | STEEL COMP 420 |
| 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 |
|---|---|
| 6781285 PRIMARY | Rolls-Royce Corporation (USA) |
| 6781285 | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 6781285 | 5/9 Secondary reference Associated Spring Barnes Group Inc |
| 6781285 | 5/9 Secondary reference Allison Transmission Inc Dba Allison Transmission, Inc |
NSN 5325-00-200-4160 is a Ring,retaining, manufactured by Rolls-Royce Corporation, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-200-4160 has 2 manufacturer part numbers on file: 6781285 (Rolls-Royce Corporation), 6781285 (General Motors Corp).
Key specifications for 6781285: Material Hardness Rating: 32.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; End Style: D SHAPE ABOVE INSIDE PERIPHERY; Material Document and Classification: AMS 5621 ASSN STD SINGLE MATERIAL RESPONSE. 11 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.