The Ring,retaining, cataloged under National Stock Number 5325-01-421-1979, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-421-1979 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Material Document and Classification | FED STD 66, COMP 1070 FED STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | TAPERED |
| Outside Diameter | 0.719 INCHES NOMINAL IN |
| Major Thickness | 0.018 INCHES NOMINAL IN |
| Inside Diameter | 0.683 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPECIAL |
| Material | STEEL COMP 1070 |
| 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 |
|---|---|
| UR-68 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5325-01-421-1979 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-421-1979: Usage Design: INTERNAL; Material Document and Classification: FED STD 66, COMP 1070 FED STD SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: TAPERED; Outside Diameter: 0.719 INCHES NOMINAL IN. 9 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.