The Ring,retaining, cataloged under National Stock Number 5325-01-312-7724, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-312-7724 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Status | ACTIVE |
| Material Hardness Rating | 39.8 ROCKWELL C MINIMUM AND 48.5 ROCKWELL C MAXIMUM |
| Usage Design | INTERNAL |
| Material Document and Classification | AISI 302 ASSN STD 1ST MATERIAL RESPONSE AND MIL-S-5059, TYPE 302 MIL SPEC 2ND MATERIAL RESPONSE |
| Cross-Sectional Shape Style | DOUBLE OVAL |
| Outside Diameter | 1.535 INCHES MINIMUM AND 1.550 INCHES MAXIMUM IN |
| Major Thickness | 0.041 INCHES MINIMUM AND 0.045 INCHES MAXIMUM IN |
| Inside Diameter | 1.345 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | SPECIAL FLAT |
| Surface Treatment | PASSIVATE |
| Material | STEEL COMP 302 |
| 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 |
|---|---|
| 10129832 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| WH-146-PA-S02 | 5/1 Secondary reference Smalley Steel Ring Co. |
| MIL-DTL-27426 | 4/1 Identification reference U.S. Government activity |
| M2742630137D | 2/2 Government specification standardization U.S. Government activity |
| RR-146-SP | 5/1 Secondary reference U.S. Government activity |
| M27426-3137D | C/1 Advisory reference — outside the item-of-supply concept Triumph Engine Control Systems Llc |
NSN 5325-01-312-7724 is a Ring,retaining, classified under FSC 5325, Fastening Devices. Status: active.
Key specifications for 5325-01-312-7724: Material Hardness Rating: 39.8 ROCKWELL C MINIMUM AND 48.5 ROCKWELL C MAXIMUM; Usage Design: INTERNAL; Material Document and Classification: AISI 302 ASSN STD 1ST MATERIAL RESPONSE AND MIL-S-5059, TYPE 302 MIL SPEC 2ND MATERIAL RESPONSE; Cross-Sectional Shape Style: DOUBLE OVAL. 11 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.