The Pump,centrifugal, cataloged under National Stock Number 4320-01-321-9959, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Central Pump and Supply Inc. Government technical data includes 21 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-321-9959 |
| Primary Part Number | B1-1/2ZRL |
| Item Name | Pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Central Pump and Supply Inc |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Intake Connection Type | THREADED INTERNAL |
| Pumping Element Operating Position | HORIZONTAL |
| Drive Shaft Length | 2.440 INCHES NOMINAL IN |
| Centrifugal Pump Impeller Quantity | 1 |
| Criticality Code Justification | FEAT |
| Centrifugal Pump Impeller Suction Type | SINGLE |
| Operating Speed at Rated Capacity | 3650.0 REVOLUTIONS PER MINUTE |
| Discharge Connection Thread Size and Series/type Designator | 1.500-11-1/2 NPT |
| Drive Shaft Type | MACHINE KEYWAY |
| Intake Connection Thread Size and Series/type Designator | 2.000-11-1/2 NPT |
| Stage Quantity | 1 |
| Discharge Pressure | 67.0 COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - CEMENT AND CONCRETE CONTAINING CENOSPHERES |
| Maximum Discharge Flow Rate | 60.0 GALLONS PER MINUTE |
| Drive Shaft End Diameter | 1.125 INCHES NOMINAL IN |
| Discharge Connection Type | THREADED INTERNAL |
| Intake Connection Quantity | 1 |
| Media for Which Designed | HYDROCARBON FUELS AND OILS |
| Pump Rotation Direction | COUNTERCLOCKWISE |
| Centrifugal Pump Design | MIXED FLOW |
| Total Head | 385.000 FEET FT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| B1-1/2ZRL | Central Pump and Supply Inc (USA) |
| Reference | Meaning |
|---|---|
| B52383 | 3/2 Design control — primary reference U.S. Government activity |
| 8623675 | D/9 Drawing number reference only U.S. Government activity |
| B1.5-ZRL | 5/9 Secondary reference U.S. Government activity |
| 8623675-01 | 5/9 Secondary reference U.S. Government activity |
NSN 4320-01-321-9959 is a Pump,centrifugal, manufactured by Central Pump and Supply Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-321-9959 has 1 manufacturer part number on file: B1-1/2ZRL (Central Pump and Supply Inc).
Key specifications for B1-1/2ZRL: Discharge Connection Quantity: 1; Intake Connection Type: THREADED INTERNAL; Pumping Element Operating Position: HORIZONTAL; Drive Shaft Length: 2.440 INCHES NOMINAL IN. 21 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.