The Pump Unit,centrifugal, cataloged under National Stock Number 4320-01-328-5505, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Pentair Flow Technologies, Llc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-328-5505 |
| Primary Part Number | 321-3/4X1X7B |
| Item Name | Pump Unit,centrifugal |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Pentair Flow Technologies, Llc |
| Status | ACTIVE |
| Discharge Connection Quantity | 1 |
| Intake Connection Type | THREADED INTERNAL |
| Pumping Element Operating Position | HORIZONTAL |
| Centrifugal Pump Impeller Quantity | 1 |
| Centrifugal Pump Impeller Suction Type | SINGLE |
| Operating Speed at Rated Capacity | 1750.0 REVOLUTIONS PER MINUTE |
| Discharge Connection Thread Size and Series/type Designator | 0.750-14 NPT |
| Intake Connection Thread Size and Series/type Designator | 1.000-11-1/2 NPT |
| Stage Quantity | 1 |
| Maximum Discharge Flow Rate | 20.0 GALLONS PER MINUTE |
| Discharge Connection Type | THREADED INTERNAL |
| Intake Connection Quantity | 1 |
| Media for Which Designed | HYDROCARBON FUELS AND OILS |
| Mounting Type | BASE |
| Centrifugal Pump Design | AXIAL FLOW |
| Total Head | 30.000 FEET FT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 321-3/4X1X7B PRIMARY | Pentair Flow Technologies, Llc (USA) |
| 321-.75IN X 1.0IN-7B | All-Safe Inc (USA) |
| Reference | Meaning |
|---|---|
| 321-BF3/4X/X7B | 5/9 Secondary reference Aurora Pump a Unit of General Signal Corp |
| 321-3/4X1X7B | 3/9 Design control — primary reference Aurora Pump a Unit of General Signal Corp |
| 321-BF3/4X1X7B | 5/9 Secondary reference Aurora Pump a Unit of General Signal Corp |
| 321-3/4X1X7B-5H | C/1 Advisory reference — outside the item-of-supply concept Aurora Pump a Unit of General Signal Corp |
| 321-3/4X1X7B-5H0-10632 | 5/9 Secondary reference Aurora Pump a Unit of General Signal Corp |
| 321-.75IN X 1.0IN-7B | 5/9 Secondary reference Aurora Pump a Unit of General Signal Corp |
NSN 4320-01-328-5505 is a Pump Unit,centrifugal, manufactured by Pentair Flow Technologies, Llc, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-328-5505 has 2 manufacturer part numbers on file: 321-3/4X1X7B (Pentair Flow Technologies, Llc), 321-.75IN X 1.0IN-7B (All-Safe Inc).
Key specifications for 321-3/4X1X7B: Discharge Connection Quantity: 1; Intake Connection Type: THREADED INTERNAL; Pumping Element Operating Position: HORIZONTAL; Centrifugal Pump Impeller Quantity: 1. 16 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.