The Ring,retaining, cataloged under National Stock Number 5325-00-072-0171, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is C E Niehoff & 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-072-0171 |
| Primary Part Number | N9588 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | C E Niehoff & Co |
| Status | ACTIVE |
| Usage Design | INTERNAL |
| Minor Thickness | 0.068 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN |
| Material Document and Classification | FED STD 66,SAE 1065 THRU 1090 FED STD SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | BEVELED ONE OUTSIDE CORNER |
| Outside Diameter | 3.091 INCHES MINIMUM AND 3.161 INCHES MAXIMUM IN |
| Major Thickness | 0.090 INCHES MINIMUM AND 0.096 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | INTERNAL |
| Surface Treatment | CADMIUM AND CHROMATE |
| Material | STEEL |
| 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 |
|---|---|
| N9588 PRIMARY | C E Niehoff & Co (USA) |
| Reference | Meaning |
|---|---|
| G36-73 | 5/9 Secondary reference C E Niehoff & Co |
NSN 5325-00-072-0171 is a Ring,retaining, manufactured by C E Niehoff & Co, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-072-0171 has 1 manufacturer part number on file: N9588 (C E Niehoff & Co).
Key specifications for N9588: Usage Design: INTERNAL; Minor Thickness: 0.068 INCHES MINIMUM AND 0.072 INCHES MAXIMUM IN; Material Document and Classification: FED STD 66,SAE 1065 THRU 1090 FED STD SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: BEVELED ONE OUTSIDE CORNER. 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.