The Ring,retaining, cataloged under National Stock Number 5325-01-606-3760, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-01-606-3760 |
| Primary Part Number | 91590A127 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Material Hardness Rating | 43.0 ROCKWELL C NOMINAL |
| Usage Design | EXTERNAL |
| Strength Rating | ERR-060 |
| Cross-Sectional Shape Style | ROUNDED OUTSIDE CORNERS |
| Outside Diameter | 0.673 INCHES MINIMUM AND 0.724 INCHES MAXIMUM IN |
| Major Thickness | 0.6875 INCHES NOMINAL IN |
| Inside Diameter | 0.625 INCHES MINIMUM AND 0.640 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL |
| Material | STEEL CORROSION RESISTING |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 91590A127 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5325-01-606-3760 is a Ring,retaining, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-606-3760 has 1 manufacturer part number on file: 91590A127 (Mcmaster-Carr Supply Co).
Key specifications for 91590A127: Material Hardness Rating: 43.0 ROCKWELL C NOMINAL; Usage Design: EXTERNAL; Strength Rating: ERR-060; Cross-Sectional Shape Style: ROUNDED OUTSIDE CORNERS. 10 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.