The Ring,wearing, cataloged under National Stock Number 4320-01-326-6975, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is M.t. Davidson Company. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-326-6975 |
| Primary Part Number | AONI-888M-US |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | M.t. Davidson Company |
| Status | ACTIVE |
| 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 |
|---|---|
| GCP-C-861 PIECE 11A | M.t. Davidson Company (USA) |
| AONI-888M-US-AP | Acme Products & Engineering Inc (USA) |
| AONI-888M-US PRIMARY | M.t. Davidson Company (USA) |
| Reference | Meaning |
|---|---|
| GCP-C-861 | D/9 Drawing number reference only M.t. Davidson Company |
NSN 4320-01-326-6975 is a Ring,wearing, manufactured by M.t. Davidson Company, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-326-6975 has 3 manufacturer part numbers on file: GCP-C-861 PIECE 11A (M.t. Davidson Company), AONI-888M-US-AP (Acme Products & Engineering Inc), AONI-888M-US (M.t. Davidson Company).
2 possible matches (shared part number, not a government interchangeability claim): 4320-01-326-7003, 4320-01-327-0456. Verify interchangeability with system specifications before substitution.
Key specifications for AONI-888M-US: End Item Identification: M.T. DAVIDSON 8 IN. AONIE CLOSE COUPLED CENTRIFUGAL PUMP NAVY STD. 13C-1150/575-20/5 A4 IN; Material: COPPER ALLOY. 1 specification is 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.