The Ring,wearing, cataloged under National Stock Number 4320-01-090-6496, 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 9 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-090-6496 |
| Primary Part Number | A0N1-2588X1US |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | M.t. Davidson Company |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Body Style | PLAIN |
| Body Outside Diameter | 5.998 INCHES NOMINAL IN |
| Unthreaded Mounting Hole Diameter | 0.281 INCHES NOMINAL IN |
| Material Document and Classification | MIL-B-16271 MIL SPEC SINGLE MATERIAL RESPONSE |
| Body Inside Diameter | 4.688 INCHES NOMINAL IN |
| Bolt Hole Quantity | 2 |
| Bolt Circle Diameter | 5.375 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 |
|---|---|
| A0N1-2588X1US PRIMARY | M.t. Davidson Company (USA) |
| GCP732 PC47 | M.t. Davidson Company (USA) |
| Reference | Meaning |
|---|---|
| GCP732 | D/9 Drawing number reference only M.t. Davidson Company |
NSN 4320-01-090-6496 is a Ring,wearing, manufactured by M.t. Davidson Company, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-090-6496 has 2 manufacturer part numbers on file: A0N1-2588X1US (M.t. Davidson Company), GCP732 PC47 (M.t. Davidson Company).
Key specifications for A0N1-2588X1US: Corner Shape: SQUARE ALL CORNERS; Body Style: PLAIN; Body Outside Diameter: 5.998 INCHES NOMINAL IN; Unthreaded Mounting Hole Diameter: 0.281 INCHES NOMINAL IN. 9 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.