The Ring,retaining, cataloged under National Stock Number 5325-01-320-8513, 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12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-320-8513 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 71.0 ROCKWELL A MINIMUM AND 77.5 ROCKWELL A MAXIMUM |
| Usage Design | EXTERNAL |
| Material Document and Classification | AISI 1070 ASSN STD 1ST MATERIAL RESPONSE AND AISI 1074 ASSN STD 2ND MATERIAL RESPONSE AND AISI 1078 ASSN STD 3RD MATERIAL RESPONSE AND AISI 1080 ASSN STD 4TH MATERIAL RESPONSE AND AISI 1084 ASSN STD 5TH MATERIAL RESPONSE AND AISI 1085 ASSN STD 6TH MATERIAL RESPONSE AND AISI 1090 ASSN STD 7TH MATERIAL RESPONSE |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 0.877 INCHES NOMINAL IN |
| Specification/standard Data | 81349-MIL-R-27426A GOVERNMENT SPECIFICATION A |
| Major Thickness | 0.040 INCHES MINIMUM AND 0.044 INCHES MAXIMUM IN |
| Inside Diameter | 0.743 INCHES MINIMUM AND 0.756 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPIRAL |
| Surface Treatment | CADMIUM AND CHROMATE |
| Material | STEEL COMP 1070 OR STEEL COMP 1074 OR STEEL COMP 1078 OR STEEL COMP 1080 OR STEEL COMP 1084 OR STEEL COMP 1085 OR STEEL COMP 1090 |
| 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 |
|---|---|
| RSN-81CD | 5/1 Secondary reference U.S. Government activity |
| MIL-DTL-27426 | 4/1 Identification reference U.S. Government activity |
| M2742620110B | 2/2 Government specification standardization U.S. Government activity |
NSN 5325-01-320-8513 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-320-8513: Material Hardness Rating: 71.0 ROCKWELL A MINIMUM AND 77.5 ROCKWELL A MAXIMUM; Usage Design: EXTERNAL; Material Document and Classification: AISI 1070 ASSN STD 1ST MATERIAL RESPONSE AND AISI 1074 ASSN STD 2ND MATERIAL RESPONSE AND AISI 1078 ASSN STD 3RD MATERIAL RESPONSE AND AISI 1080 ASSN STD 4TH MATERIAL RESPONSE AND AISI 1084 ASSN STD 5TH MATERIAL RESPONSE AND AISI 1085 ASSN STD 6TH MATERIAL RESPONSE AND AISI 1090 ASSN STD 7TH MATERIAL RESPONSE; Cross-Sectional Shape Style: DOUBLE OVAL. 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.