The Pump,centrifugal, cataloged under National Stock Number 4320-01-282-4156, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Oberdorfer Foundries Inc. Government technical data includes 24 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4320-01-282-4156 |
| Primary Part Number | 501M |
| Item Name | Pump,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Oberdorfer Foundries Inc |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Intake Connection Type | THREADED INTERNAL |
| Suction Lift | 15.000 FEET FT |
| Drive Shaft Length | 1.875 INCHES NOMINAL IN |
| Drive Connection Type | FLEXIBLE COUPLED |
| Unpackaged Unit Length | 8.531 INCHES NOMINAL IN |
| Centrifugal Pump Impeller Quantity | 1 |
| Centrifugal Pump Impeller Suction Type | SINGLE |
| Operating Speed at Rated Capacity | 1750.0 REVOLUTIONS PER MINUTE |
| Unpackaged Unit Width | 6.000 INCHES NOMINAL IN |
| Discharge Connection Thread Size and Series/type Designator | 1.250-11-1/2 NPT |
| Drive Shaft Type | MACHINE KEYWAY |
| Intake Connection Thread Size and Series/type Designator | 1.250-11-1/2 NPT |
| Unpackaged Unit Height | 4.562 INCHES NOMINAL IN |
| Stage Quantity | 1 |
| Maximum Discharge Flow Rate | 58.0 GALLONS PER MINUTE |
| Drive Shaft End Diameter | 1.000 INCHES NOMINAL IN |
| Discharge Connection Type | THREADED INTERNAL |
| Intake Connection Quantity | 1 |
| Material | COPPER ALLOY PUMP BASIC |
| Media for Which Designed | WATER, FRESH AND WATER, SALT |
| Pump Rotation Direction | CLOCKWISE AND COUNTERCLOCKWISE |
| Mounting Type | BASE |
| Centrifugal Pump Design | AXIAL FLOW |
| 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 |
|---|---|
| 501M PRIMARY | Oberdorfer Foundries Inc (USA) |
| Reference | Meaning |
|---|---|
| 501M-BRZ-1HP MT | C/1 Advisory reference — outside the item-of-supply concept Oberdorfer Foundries Inc |
NSN 4320-01-282-4156 is a Pump,centrifugal, manufactured by Oberdorfer Foundries Inc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-282-4156 has 1 manufacturer part number on file: 501M (Oberdorfer Foundries Inc).
Key specifications for 501M: Discharge Connection Quantity: 1; Intake Connection Type: THREADED INTERNAL; Suction Lift: 15.000 FEET FT; Drive Shaft Length: 1.875 INCHES NOMINAL IN. 24 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.