The Ring,retaining, cataloged under National Stock Number 5325-00-477-0304, is classified within Federal Supply Class 5325 (Fastening Devices) of the Hardware and Abrasives group. The manufacturer of record is Parker Hannifin Corporation Div Chelsea Products Division. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 6 manufacturer part numbers 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5325-00-477-0304 |
| Primary Part Number | 378391 |
| Item Name | Ring,retaining |
| FSC / FSG | 5325 / 53 — Fastening Devices |
| Manufacturer | Parker Hannifin Corporation Div Chelsea Products Division |
| Status | ACTIVE |
| Material Hardness Rating | 53.0 ROCKWELL C MAXIMUM |
| Usage Design | EXTERNAL |
| End Style | VERTEX BELOW CENTER |
| Cross-Sectional Shape Style | RECTANGULAR |
| Outside Diameter | 1.238 INCHES MINIMUM IN |
| Major Thickness | 0.090 INCHES MINIMUM AND 0.095 INCHES MAXIMUM IN |
| Inside Diameter | 1.085 INCHES MINIMUM AND 1.110 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Ring Style | STRAIGHT GAP |
| Material | STEEL COMP 1060 OR STEEL COMP 1065 |
| 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 |
|---|---|
| 10560465 | General Dynamics Land Systems Canadacorp (CAN) |
| 10162185 | Us Army Aviation and Missile Command (USA) |
| 378391 PRIMARY | Parker Hannifin Corporation Div Chelsea Products Division (USA) |
| 378391 | Ele Advanced Technologies Limited (GBR) |
| 802CX277 | Oshkosh Defense Llc (USA) |
| 945052 | Hymac Parts and Service Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 378391 | 5/9 Secondary reference U.S. Government activity |
| 802CX277 | 5/9 Secondary reference Oshkosh Corp |
NSN 5325-00-477-0304 is a Ring,retaining, manufactured by Parker Hannifin Corporation Div Chelsea Products Division, classified under FSC 5325, Fastening Devices. Status: active.
NSN 5325-00-477-0304 has 6 manufacturer part numbers on file: 10560465 (General Dynamics Land Systems Canadacorp), 10162185 (Us Army Aviation and Missile Command), 378391 (Parker Hannifin Corporation Div Chelsea Products Division), 378391 (Ele Advanced Technologies Limited), 802CX277 (Oshkosh Defense Llc) and 1 more.
1 possible match (shared part number, not a government interchangeability claim): 5995-01-510-9323. Verify interchangeability with system specifications before substitution.
Key specifications for 378391: Material Hardness Rating: 53.0 ROCKWELL C MAXIMUM; Usage Design: EXTERNAL; End Style: VERTEX BELOW CENTER; 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.