The Pump,rotary, cataloged under National Stock Number 4320-01-347-4423, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Viking Pump, Inc. Government technical data includes 10 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-347-4423 |
| Primary Part Number | BA1288-1 |
| Item Name | Pump,rotary |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Viking Pump, Inc |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Intake Connection Type | ROUND FLANGE |
| Pumping Element Operating Position | HORIZONTAL |
| Drive Shaft Length | 1.625 INCHES NOMINAL IN |
| Drive Shaft Type | MACHINE KEYWAY |
| Drive Shaft End Diameter | 0.499 INCHES MINIMUM AND 0.500 INCHES MAXIMUM IN |
| Discharge Connection Type | ROUND FLANGE |
| Intake Connection Quantity | 1 |
| Pump Rotation Direction | COUNTERCLOCKWISE |
| Operation Method | POWERED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
NSN 4320-01-347-4423 is a Pump,rotary, manufactured by Viking Pump, Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-347-4423 has 3 manufacturer part numbers on file: BA1288-1 (Geiger Pump and Equipment Company Dba Geiger Pump & Equipment Co), BA1288-1 (Viking Pump, Inc), BA1288-1 (Eastern Industrial Products, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-699-5717. Verify interchangeability with system specifications before substitution.
Key specifications for BA1288-1: Discharge Connection Quantity: 1; Intake Connection Type: ROUND FLANGE; Pumping Element Operating Position: HORIZONTAL; Drive Shaft Length: 1.625 INCHES NOMINAL IN. 10 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.