The Ring,retaining, cataloged under National Stock Number 5325-01-356-6699, 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10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5325-01-356-6699 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 55.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 61.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM |
| Usage Design | EXTERNAL |
| Material Document and Classification | QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 0.693 INCHES NOMINAL IN |
| Major Thickness | 0.033 INCHES MINIMUM AND 0.037 INCHES MAXIMUM IN |
| Inside Diameter | 0.570 INCHES MINIMUM AND 0.583 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPIRAL |
| 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 | N |
| Reference | Meaning |
|---|---|
| MIL-R-27426 | 4/1 Identification reference U.S. Government activity |
| M27426-2105E | 2/2 Government specification standardization U.S. Government activity |
| WSM-62BEC | 5/1 Secondary reference Smalley Steel Ring Co. |
| RSN62M | 5/1 Secondary reference U.S. Government activity |
NSN 5325-01-356-6699 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-356-6699: Material Hardness Rating: 55.0 ROCKWELL SUPERFICIAL 30-N MINIMUM AND 61.0 ROCKWELL SUPERFICIAL 30-N MAXIMUM; Usage Design: EXTERNAL; Material Document and Classification: QQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: DOUBLE OVAL. 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.