The Ring,wearing, cataloged under National Stock Number 4320-00-398-7285, 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 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-00-398-7285 |
| Primary Part Number | 55-22187-190/S |
| 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 | PLAIN |
| Body Outside Diameter | 6.558 INCHES NOMINAL IN |
| Body Inside Diameter | 6.125 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| 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 |
|---|---|
| 55-22187-190/S | Euramco Safety Inc (USA) |
| Reference | Meaning |
|---|---|
| F6A11A3 | 3/9 Design control — primary reference Itt Bell and Gosset-Hydronics a Unit of Itt Fluid Handling Div |
| A1A222A37PC190S | 5/9 Secondary reference Cooper Industries Inc Dba Cooper Tools |
| A1A222A37PC190S | 5/9 Secondary reference Cooper Industries Industrial Machinery Div |
NSN 4320-00-398-7285 is a Ring,wearing, manufactured by Euramco Safety Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-00-398-7285 has 1 manufacturer part number on file: 55-22187-190/S (Euramco Safety Inc).
Key specifications for 55-22187-190/S: Corner Shape: SQUARE ALL CORNERS; Body Style: PLAIN; Body Outside Diameter: 6.558 INCHES NOMINAL IN; Overall Length: 0.875 INCHES NOMINAL IN. 5 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.