The Ring,retaining, cataloged under National Stock Number 5325-00-021-5301, 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10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-00-021-5301 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 36.0 ROCKWELL C NOMINAL |
| Usage Design | INTERNAL |
| Minor Thickness | 0.079 INCHES MINIMUM AND 0.084 INCHES MAXIMUM IN |
| Material Document and Classification | AMS 5520 ASSN STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | BEVELED ONE OUTSIDE CORNER |
| Outside Diameter | 3.363 INCHES MINIMUM AND 3.473 INCHES MAXIMUM IN |
| Major Thickness | 0.106 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL |
| Material | STEEL COMP 632 |
| 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 |
|---|---|
| 627941 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| N5002-306H | 3/9 Design control — primary reference Truarc Company Llc Dba Waldes Truarc |
| N5002-306H | C/1 Advisory reference — outside the item-of-supply concept Rotor Clip Company, Inc. |
| 627941 | 5/9 Secondary reference Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 5325-00-021-5301 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-00-021-5301: Material Hardness Rating: 36.0 ROCKWELL C NOMINAL; Usage Design: INTERNAL; Minor Thickness: 0.079 INCHES MINIMUM AND 0.084 INCHES MAXIMUM IN; Material Document and Classification: AMS 5520 ASSN STD 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.