The Ring,retaining, cataloged under National Stock Number 5325-01-679-3431, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-679-3431 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| Surface Treatment Document and Classification | ASTM B633,TY II,CL FE/ZN5 OR ASTM B695,TY II,CL 5 ASSN STD SINGLE TREATMENT RESPONSE |
| Material Document and Classification | SAE AIR4127,1060-1090 CARBON STEEL NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 1.640 INCHES MINIMUM AND 1.685 INCHES MAXIMUM IN |
| Gap Opening | OPENING 90 DEGREES OR MORE |
| Specification/standard Data | 96906-MS16625E GOVERNMENT STANDARD |
| Major Thickness | 0.048 INCHES MINIMUM AND 0.052 INCHES MAXIMUM IN |
| Ring Style | INTERNAL |
| Surface Treatment | ZINC |
| Material | STEEL |
| 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 |
|---|---|
| MIL-DTL-21248 | 4/1 Identification reference U.S. Government activity |
| MS16625-2150 | 2/2 Government specification standardization U.S. Government activity |
NSN 5325-01-679-3431 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-679-3431: Material Hardness Rating: 47.0 ROCKWELL C MINIMUM AND 52.0 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Surface Treatment Document and Classification: ASTM B633,TY II,CL FE/ZN5 OR ASTM B695,TY II,CL 5 ASSN STD SINGLE TREATMENT RESPONSE; Material Document and Classification: SAE AIR4127,1060-1090 CARBON STEEL NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE. 12 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.