The Ring,wearing, cataloged under National Stock Number 4320-01-026-2962, 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 13 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-026-2962 |
| Primary Part Number | AYC-488BUS |
| Item Name | Ring,wearing |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | M.t. Davidson Company |
| Status | ACTIVE |
| Flange Diameter | 6.375 INCHES NOMINAL IN |
| Corner Shape | SQUARE ALL CORNERS |
| Distance Between Flanges | 0.125 INCHES NOMINAL IN |
| Body Style | EXTERNAL LOCKING FLANGE |
| Body Outside Diameter | 5.998 INCHES MINIMUM AND 5.999 INCHES MAXIMUM IN |
| End to Flange Distance | 0.437 INCHES NOMINAL IN |
| Left Side Flange Thickness | 0.187 INCHES NOMINAL IN |
| Distance Below Centerline | 0.062 INCHES NOMINAL IN |
| Body Inside Diameter | 4.937 INCHES NOMINAL IN |
| Right Side Flange Thickness | 0.187 INCHES NOMINAL IN |
| Smallest External Anchor Flange Radius | 2.500 INCHES NOMINAL IN |
| Material | NICKEL ALLOY |
| Largest External Anchor Flange Radius | 2.999 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 |
|---|---|
| GCP-661PC64 | M.t. Davidson Company (USA) |
| AYC-488BUS PRIMARY | M.t. Davidson Company (USA) |
| Reference | Meaning |
|---|---|
| GCP-662 | D/9 Drawing number reference only M.t. Davidson Company |
NSN 4320-01-026-2962 is a Ring,wearing, manufactured by M.t. Davidson Company, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-026-2962 has 2 manufacturer part numbers on file: GCP-661PC64 (M.t. Davidson Company), AYC-488BUS (M.t. Davidson Company).
3 possible matches (shared part number, not a government interchangeability claim): 4320-01-077-7993, 4330-01-187-2591, 4320-01-242-1431. Verify interchangeability with system specifications before substitution.
Key specifications for AYC-488BUS: Flange Diameter: 6.375 INCHES NOMINAL IN; Corner Shape: SQUARE ALL CORNERS; Distance Between Flanges: 0.125 INCHES NOMINAL IN; Body Style: EXTERNAL LOCKING FLANGE. 13 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.