The Ring,retaining, cataloged under National Stock Number 5325-00-663-2212, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-663-2212 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| Minor Thickness | 0.078 INCHES NOMINAL IN |
| Material Document and Classification | FED STD NO. 66,1066 THRU 1090 FED STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | BEVELED ONE OUTSIDE CORNER |
| Outside Diameter | 4.060 INCHES NOMINAL IN |
| Major Thickness | 0.109 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL |
| Surface Treatment | 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 |
| Reference | Meaning |
|---|---|
| MS16631-1375 | 2/2 Government specification standardization U.S. Government activity |
| 823063-10 | 5/1 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| 6-61 | 5/9 Secondary reference Northrop Grumman Systems Corporation Div Es Defensive Systems Division |
| N5002-375MD | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
| N5002-375MD | C/1 Advisory reference — outside the item-of-supply concept Rotor Clip Company, Inc. |
| R274NAD0375NN056NN PF | 5/9 Secondary reference The American Society of Mechanical Engineers |
NSN 5325-00-663-2212 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-00-663-2212: Material Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Minor Thickness: 0.078 INCHES NOMINAL IN; Material Document and Classification: FED STD NO. 66,1066 THRU 1090 FED 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.