The Ring,retaining, cataloged under National Stock Number 5325-01-342-2851, 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12 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-342-2851 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 40.0 ROCKWELL C MINIMUM AND 51.5 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| Strength Rating | ERR-060 |
| Material Document and Classification | MIL-S-46049, COMP 1074 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-S-46049, COMP 1085 MIL SPEC 2ND MATERIAL RESPONSE |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 4.501 INCHES MINIMUM AND 4.536 INCHES MAXIMUM IN |
| Major Thickness | 0.108 INCHES MINIMUM AND 0.115 INCHES MAXIMUM IN |
| Inside Diameter | 3.877 INCHES MINIMUM AND 3.912 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPECIAL FLAT |
| Surface Treatment | CADMIUM AND CHROMATE |
| Material | STEEL COMP 1074 OR STEEL COMP 1085 |
| 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 |
|---|---|
| M2742640165B | 2/2 Government specification standardization U.S. Government activity |
| RRN-425CD | 5/1 Secondary reference U.S. Government activity |
| MIL-DTL-27426/4 | 4/1 Identification reference U.S. Government activity |
| MIL-DTL-27426 | 5/9 Secondary reference U.S. Government activity |
NSN 5325-01-342-2851 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-342-2851: Material Hardness Rating: 40.0 ROCKWELL C MINIMUM AND 51.5 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Strength Rating: ERR-060; Material Document and Classification: MIL-S-46049, COMP 1074 MIL SPEC 1ST MATERIAL RESPONSE AND MIL-S-46049, COMP 1085 MIL SPEC 2ND 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.