The Pump,centrifugal, cataloged under National Stock Number 4320-01-657-9938, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Hy-Tech Machine, Inc. Dba Thaxton Division Div Atp. Government technical data includes 9 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-657-9938 |
| Primary Part Number | ATP 551P |
| Item Name | Pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Hy-Tech Machine, Inc. Dba Thaxton Division Div Atp |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Pumping Element Operating Position | VERTICAL |
| Features Provided | SUBMERSIBLE |
| Discharge Connection Thread Size and Series/type Designator | T2.50 IN NPT IN |
| Discharge Pressure | 00.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING CENOSPHERES |
| Maximum Discharge Flow Rate | 216.00 GALLONS PER MINUTE |
| Discharge Connection Type | THREADED INTERNAL |
| Material | IRON CAST PUMP BASIC |
| Media for Which Designed | OIL OR WATER, WASTE |
| 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 |
|---|---|
| ATP 551P PRIMARY | Hy-Tech Machine, Inc. Dba Thaxton Division Div Atp (USA) |
NSN 4320-01-657-9938 is a Pump,centrifugal, manufactured by Hy-Tech Machine, Inc. Dba Thaxton Division Div Atp, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-657-9938 has 1 manufacturer part number on file: ATP 551P (Hy-Tech Machine, Inc. Dba Thaxton Division Div Atp).
Key specifications for ATP 551P: Discharge Connection Quantity: 1; Pumping Element Operating Position: VERTICAL; Features Provided: SUBMERSIBLE; Discharge Connection Thread Size and Series/type Designator: T2.50 IN NPT 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.