The Ring,retaining, cataloged under National Stock Number 5325-01-303-4920, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-303-4920 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| Minor Thickness | 0.047 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN |
| Material Document and Classification | QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | BEVELED ONE OUTSIDE CORNER |
| Outside Diameter | 1.709 INCHES MINIMUM AND 1.769 INCHES MAXIMUM IN |
| Major Thickness | 0.059 INCHES MINIMUM AND 0.065 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL |
| Material | COPPER ALLOY 170 OR COPPER ALLOY 172 |
| 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 |
|---|---|
| MS16631-5156 | 2/2 Government specification standardization U.S. Government activity |
| VHO-156-BC | 5/1 Secondary reference Rotor Clip Company, Inc. |
| N1302-156-BC | 5/9 Secondary reference Seeger Inc Anderton-United Products Div |
| N5002-156-C | 5/9 Secondary reference Truarc Company Llc Dba Waldes Truarc |
NSN 5325-01-303-4920 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-303-4920: Material Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Minor Thickness: 0.047 INCHES MINIMUM AND 0.049 INCHES MAXIMUM IN; Material Document and Classification: QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE. 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.