The Ring,retaining, cataloged under National Stock Number 5325-01-593-0990, 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 9 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 | 5325-01-593-0990 |
| Primary Part Number | 99142A620 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Material Document and Classification | FED STD 66, COMP 1060 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1090 FED STD 2ND MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 2.745 INCHES MINIMUM AND 2.815 INCHES MAXIMUM IN |
| Major Thickness | 0.075 INCHES MINIMUM AND 0.081 INCHES MAXIMUM IN |
| Casehardening Indicator | CASEHARDENED |
| Ring Style | INTERNAL |
| Surface Treatment | PHOSPHATE |
| Material | STEEL COMP 1060 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 |
| Part Number | Manufacturer |
|---|---|
| 99142A620 PRIMARY | Mcmaster-Carr Supply Co (USA) |
NSN 5325-01-593-0990 is a Ring,retaining, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-01-593-0990 has 1 manufacturer part number on file: 99142A620 (Mcmaster-Carr Supply Co).
Key specifications for 99142A620: Usage Design: INTERNAL; Material Document and Classification: FED STD 66, COMP 1060 FED STD 1ST MATERIAL RESPONSE AND FED STD 66, COMP 1090 FED STD 2ND MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR; Outside Diameter: 2.745 INCHES MINIMUM AND 2.815 INCHES MAXIMUM IN. 9 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.