The Ring,retaining, cataloged under National Stock Number 5325-00-561-7728, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Us Army Aviation and Missile Command. 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 | 5325-00-561-7728 |
| Primary Part Number | 8512181 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| End Style | VERTEX CENTER OR ABOVE |
| Material Document and Classification | QQ-W-423, COMPOSITION FS410, CONDITION B FED SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 1.640 INCHES NOMINAL IN |
| Major Thickness | 0.094 INCHES NOMINAL IN |
| Inside Diameter | 1.452 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Material | STEEL COMP 410 |
| 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 |
|---|---|
| 8512181 PRIMARY | Us Army Aviation and Missile Command (USA) |
NSN 5325-00-561-7728 is a Ring,retaining, manufactured by Us Army Aviation and Missile Command, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-561-7728 has 1 manufacturer part number on file: 8512181 (Us Army Aviation and Missile Command).
Key specifications for 8512181: Usage Design: EXTERNAL; End Style: VERTEX CENTER OR ABOVE; Material Document and Classification: QQ-W-423, COMPOSITION FS410, CONDITION B FED SPEC SINGLE MATERIAL RESPONSE; Cross-Sectional Shape Style: RECTANGULAR. 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.