The Ring,retaining, cataloged under National Stock Number 5325-00-854-6721, 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10 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-854-6721 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | CANCELLED |
| Material Hardness Rating | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL |
| Material Document and Classification | FED STD 66, COMP 1066 FED STD 1ST MATERIAL RESPONSE OR FED STD 66, COMP 1069 FED STD 2ND MATERIAL RESPONSE OR FED STD 66, COMP 1070 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1072 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 1074 FED STD 5TH MATERIAL RESPONSE OR FED STD 66, COMP 1075 FED STD 6TH MATERIAL RESPONSE OR FED STD 66, COMP 1078 FED STD 7TH MATERIAL RESPONSE OR FED STD 66, COMP 1080 FED STD 8TH MATERIAL RESPONSE OR FED STD 66, COMP 1084 FED STD 9TH MATERIAL RESPONSE OR FED STD 66, COMP 1085 FED STD 10TH MATERIAL RESPONSE OR FED STD 66, COMP 1086 FED STD 11TH MATERIAL RESPONSE OR FED STD 66, COMP 1090 FED STD 12TH MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Major Thickness | 0.106 INCHES MINIMUM AND 0.112 INCHES MAXIMUM IN |
| Inside Diameter | 4.662 INCHES MINIMUM AND 4.712 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | EXTERNAL |
| Surface Treatment | CADMIUM AND CHROMATE OR CADMIUM AND CHROMATE |
| Material | STEEL COMP 1566 OR STEEL COMP 1069 OR STEEL COMP 1070 OR STEEL COMP 1572 OR STEEL COMP 1074 OR STEEL COMP 1075 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1085 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 |
|---|---|
| 3100-500-ST-CD | 5/9 Secondary reference U.S. Government activity |
| 5365008546721 | 6/9 Informative reference only E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 3100-500-ST-CD | C/1 Advisory reference — outside the item-of-supply concept Rotor Clip Company, Inc. |
| MIL-DTL-21248 | 4/1 Identification reference U.S. Government activity |
| MS16624-1500 | 2/2 Government specification standardization U.S. Government activity |
| 5100-500 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
NSN 5325-00-854-6721 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: cancelled.
2 possible matches (shared part number, not a government interchangeability claim): 1670-01-029-8555, 3040-01-644-9065. Verify interchangeability with system specifications before substitution.
Key specifications for 5325-00-854-6721: Material Hardness Rating: 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL; Material Document and Classification: FED STD 66, COMP 1066 FED STD 1ST MATERIAL RESPONSE OR FED STD 66, COMP 1069 FED STD 2ND MATERIAL RESPONSE OR FED STD 66, COMP 1070 FED STD 3RD MATERIAL RESPONSE OR FED STD 66, COMP 1072 FED STD 4TH MATERIAL RESPONSE OR FED STD 66, COMP 1074 FED STD 5TH MATERIAL RESPONSE OR FED STD 66, COMP 1075 FED STD 6TH MATERIAL RESPONSE OR FED STD 66, COMP 1078 FED STD 7TH MATERIAL RESPONSE OR FED STD 66, COMP 1080 FED STD 8TH MATERIAL RESPONSE OR FED STD 66, COMP 1084 FED STD 9TH MATERIAL RESPONSE OR FED STD 66, COMP 1085 FED STD 10TH MATERIAL RESPONSE OR FED STD 66, COMP 1086 FED STD 11TH MATERIAL RESPONSE OR FED STD 66, COMP 1090 FED STD 12TH MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR. 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 5325-00-854-6721 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.