The Ring,retaining, cataloged under National Stock Number 5325-01-281-8720, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-281-8720 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| Minor Thickness | 0.070 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN |
| Strength Rating | ERR-060 |
| Supplementary Features | SUBSTITUTE FOR NSN 5365-00-285-6960 UNPLATED FINISH |
| Material Document and Classification | FED STD 66, COMP 1066 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1090 FED STD 2ND MATERIAL RESPONSE |
| Cross-Sectional Shape Style | BEVELED ONE OUTSIDE CORNER |
| Outside Diameter | 3.091 INCHES MINIMUM AND 3.161 INCHES MAXIMUM IN |
| Specification/standard Data | 96906-MS16631 GOVERNMENT STANDARD |
| Major Thickness | 0.092 INCHES MINIMUM AND 0.098 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL |
| Surface Treatment | CADMIUM AND CHROMATE |
| Material | STEEL COMP 1566 OR STEEL COMP 1090 |
| 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 |
|---|---|
| N5002-281-MD | 5/1 Secondary reference Rotor Clip Company, Inc. |
| MS16631-1281 | 2/2 Government specification standardization U.S. Government activity |
| N5002-281-MD | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
NSN 5325-01-281-8720 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-281-8720: Material Hardness Rating: 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Minor Thickness: 0.070 INCHES MINIMUM AND 0.074 INCHES MAXIMUM IN; Strength Rating: ERR-060. 14 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.