The Piston,pump, cataloged under National Stock Number 4320-01-464-8470, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is The Entwistle Company Llc. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4320-01-464-8470 |
| Primary Part Number | 9325-03-3071-01 |
| Item Name | Piston,pump |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | The Entwistle Company Llc |
| Status | ACTIVE |
| Integral Connecting Rod | NOT INCLUDED |
| Retaining Ring Groove | NOT INCLUDED |
| Diameter | 0.492 INCHES MAXIMUM IN |
| Pin | NOT INCLUDED |
| Oil Groove | INCLUDED |
| Ring | NOT INCLUDED |
| Pin Hole Bushing | NOT INCLUDED |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 9325-03-3071-01 PRIMARY | The Entwistle Company Llc (USA) |
| Reference | Meaning |
|---|---|
| 9325-03-3071 | D/9 Drawing number reference only The Entwistle Company Llc |
NSN 4320-01-464-8470 is a Piston,pump, manufactured by The Entwistle Company Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-464-8470 has 1 manufacturer part number on file: 9325-03-3071-01 (The Entwistle Company Llc).
Key specifications for 9325-03-3071-01: Overall Height: 2.220 INCHES MAXIMUM IN; Integral Connecting Rod: NOT INCLUDED; Retaining Ring Groove: NOT INCLUDED; Diameter: 0.492 INCHES MAXIMUM IN. 8 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.