The Ring,wearing, cataloged under National Stock Number 4320-01-037-8340, 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. The record lists 4 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Ring,wearing |
| FSC / FSG | 4320 — Power and Hand Pumps (FSG 43) |
| Manufacturers | Euramco Safety Inc (CAGE 52081); M.t. Davidson Company (CAGE 16062) |
| Parameter | Value |
|---|---|
| NSN | 4320-01-037-8340 |
| Primary Part Number | 55-22589-18AUS |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Euramco Safety Inc |
| Status | ACTIVE |
| 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 |
|---|---|
| 55-22589-18AUS PRIMARY | Euramco Safety Inc (USA) |
| GCP-676 PC11A | M.t. Davidson Company (USA) |
| GCP-677PC11A | M.t. Davidson Company (USA) |
| A0NI-2588X2US PRIMARY | M.t. Davidson Company (USA) |
| Reference | Meaning |
|---|---|
| GCP-677 | D/9 Drawing number reference only M.t. Davidson Company |
| 4320PL1250631 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
| 55-22589-19AUS | 5/9 Secondary reference Euramco Safety Inc |
NSN 4320-01-037-8340 is a Ring,wearing, manufactured by Euramco Safety Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-037-8340 has 4 manufacturer part numbers on file: 55-22589-18AUS (Euramco Safety Inc), GCP-676 PC11A (M.t. Davidson Company), GCP-677PC11A (M.t. Davidson Company), A0NI-2588X2US (M.t. Davidson Company).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-037-9167. Verify interchangeability with system specifications before substitution.
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.