The Ring,retaining, cataloged under National Stock Number 5325-00-721-8360, 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10 specifications, cited from the U.S. Government catalog. 10 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5325-00-721-8360 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | CANCELLED |
| Usage Design | EXTERNAL |
| Material Document and Classification | FED STD 66 AISI 1066 OR 1074 OR 1075 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 FED STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Nondefinitive Spec/std Data | 1 TYPE AND 2 CLASS |
| Major Thickness | 0.023 INCHES MINIMUM AND 0.027 INCHES MAXIMUM IN |
| Inside Diameter | 0.423 INCHES MINIMUM AND 0.430 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | EXTERNAL |
| Surface Treatment | CADMIUM AND CHROMATE OR CHROMATE ZINC |
| Material | STEEL COMP 1066 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1086 OR STEEL COMP 1090 |
| Acquisition Status | CANCELLED |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5100-46 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 4L141 | C/1 Advisory reference — outside the item-of-supply concept The Electric Tachometer Corp. |
| MIL-DTL-21248 | 4/1 Identification reference U.S. Government activity |
| MILR21248 | 5/9 Secondary reference U.S. Government activity |
| 3100-46CD | 5/1 Secondary reference U.S. Government activity |
| MS16624-1046 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 5365007218360 | 5/9 Secondary reference E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| K8691163PT2 | 5/9 Secondary reference General Electric Company |
| MS16624-1046 | 2/2 Government specification standardization U.S. Government activity |
| 501095 | C/1 Advisory reference — outside the item-of-supply concept Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
NSN 5325-00-721-8360 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: cancelled.
3 possible matches (shared part number, not a government interchangeability claim): 5325-00-809-0572, 5950-01-243-0825, 7025-01-457-4495. Verify interchangeability with system specifications before substitution.
Key specifications for 5325-00-721-8360: Usage Design: EXTERNAL; Material Document and Classification: FED STD 66 AISI 1066 OR 1074 OR 1075 OR 1078 OR 1080 OR 1084 OR 1086 OR 1090 FED STD SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR; Nondefinitive Spec/std Data: 1 TYPE AND 2 CLASS. 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.
NSN 5325-00-721-8360 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.
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.