The Ring,retaining, cataloged under National Stock Number 5325-00-598-0768, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics. Government technical data includes 11 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5325-00-598-0768 |
| Primary Part Number | 881821 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics |
| Status | ACTIVE |
| Usage Design | EXTERNAL |
| End Style | VERTEX BELOW CENTER |
| Material Diameter | 0.063 INCHES NOMINAL IN |
| Material Document and Classification | MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE |
| Cross-Sectional Shape Style | ROUND |
| Outside Diameter | 1.999 INCHES NOMINAL IN |
| Inside Diameter | 1.875 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Surface Treatment | CADMIUM |
| 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 |
|---|---|
| 881821 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics (USA) |
| Reference | Meaning |
|---|---|
| 881821 | 5/1 Secondary reference Parker-Hannifin Corporation Dba Service and Support Operation Div Services and Support Operations |
| 881821 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5325-00-598-0768 is a Ring,retaining, manufactured by Parker-Hannifin Corporation Dba Pneutronics, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-598-0768 has 1 manufacturer part number on file: 881821 (Parker-Hannifin Corporation Dba Pneutronics).
1 possible match (shared part number, not a government interchangeability claim): 5998-01-062-2811. Verify interchangeability with system specifications before substitution.
Key specifications for 881821: Usage Design: EXTERNAL; End Style: VERTEX BELOW CENTER; Material Diameter: 0.063 INCHES NOMINAL IN; Material Document and Classification: MIL-W-6101 MIL SPEC SINGLE MATERIAL RESPONSE. 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.