The Ring,wearing, cataloged under National Stock Number 4320-01-050-7392, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Euramco Safety Inc. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-050-7392 |
| Primary Part Number | 55-22009-19OS |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Euramco Safety Inc |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | GROOVED |
| Body Outside Diameter | 5.737 INCHES NOMINAL IN |
| Groove Depth | 0.031 INCHES NOMINAL IN |
| Counterbore Depth | 0.188 INCHES NOMINAL IN |
| Groove Quantity | 3 |
| Body Inside Diameter | 5.250 INCHES NOMINAL IN |
| Counterbore Diameter | 5.270 INCHES NOMINAL IN |
| Bolt Hole Quantity | 3 |
| Material | COPPER ALLOY AND NICKEL ALLOY |
| Groove Width | 0.094 INCHES NOMINAL IN |
| Hole Diameter | 0.190 INCHES NOMINAL IN |
| 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 |
|---|---|
| 55-22009-19OS PRIMARY | Euramco Safety Inc (USA) |
| Reference | Meaning |
|---|---|
| RGF-B35A | 5/9 Secondary reference Euramco Safety Inc |
| 55-22009-19 | 5/9 Secondary reference Euramco Safety Inc |
NSN 4320-01-050-7392 is a Ring,wearing, manufactured by Euramco Safety Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-050-7392 has 1 manufacturer part number on file: 55-22009-19OS (Euramco Safety Inc).
Key specifications for 55-22009-19OS: Corner Shape: SQUARE ALL CORNERS; Body Style: GROOVED; Body Outside Diameter: 5.737 INCHES NOMINAL IN; Overall Length: 0.688 INCHES NOMINAL IN. 12 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.