The Sleeve,shaft,pump, cataloged under National Stock Number 4320-01-128-9588, 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 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4320-01-128-9588 |
| Primary Part Number | A0NI-2593X6 |
| Item Name | Sleeve,shaft,pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | M.t. Davidson Company |
| Status | ACTIVE |
| Corner Shape | SQUARE ALL CORNERS |
| Hardness Rating | 265.0 BRINELL STANDARD NOMINAL OVERALL |
| Style Designator | SOLID, PLAIN, NO OUTSIDE FLANGES |
| Material Document and Classification | QQ-B-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Lubricant Accommodation Style | GROOVED CIRCULAR |
| Material | NICKEL ALLOY K-500 OVERALL |
| Surface Groove Location and Quantity | 1 INTERNAL |
| 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 |
|---|---|
| A0NI-2593X6 PRIMARY | M.t. Davidson Company (USA) |
| GCP-769 PC 1 | M.t. Davidson Company (USA) |
| Reference | Meaning |
|---|---|
| GCP-769 | D/9 Drawing number reference only M.t. Davidson Company |
| GCP-770 | D/9 Drawing number reference only M.t. Davidson Company |
NSN 4320-01-128-9588 is a Sleeve,shaft,pump, manufactured by M.t. Davidson Company, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-128-9588 has 2 manufacturer part numbers on file: A0NI-2593X6 (M.t. Davidson Company), GCP-769 PC 1 (M.t. Davidson Company).
4 possible matches (shared part number, not a government interchangeability claim): 4320-01-130-6253, 4320-01-130-8561, 4320-01-131-3854. Verify interchangeability with system specifications before substitution.
Key specifications for A0NI-2593X6: Corner Shape: SQUARE ALL CORNERS; Hardness Rating: 265.0 BRINELL STANDARD NOMINAL OVERALL; Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Material Document and Classification: QQ-B-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL. 7 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.