The Pump Subassembly,rotary, cataloged under National Stock Number 4320-01-554-0900, is classified within Federal Supply Class 4320 (Power and Hand Pumps) of the Pumps and Compressors group. The manufacturer of record is Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4320-01-554-0900 |
| Primary Part Number | E-4739/BX2-1/2NAFM-NHRB |
| Item Name | Pump Subassembly,rotary |
| FSC / FSG | 4320 / 43 — Power and Hand Pumps |
| Manufacturer | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer |
| Status | ACTIVE |
| Major Components | PUMP 1, GEAR BOX 1, ELECTRIC MOTOR 1 |
| 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 |
|---|---|
| BX2-1/2NAFN-NHRB | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA) |
| E-4739/BX2-1/2NAFM-NHRB PRIMARY | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA) |
| BXL2-1/2NAFM-NHRB PRIMARY | Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer (USA) |
| Reference | Meaning |
|---|---|
| BXL2-1/2NAFN-NHRB | 3/9 Design control — primary reference Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer |
NSN 4320-01-554-0900 is a Pump Subassembly,rotary, manufactured by Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer, classified under FSC 4320, Power and Hand Pumps. Status: active.
NSN 4320-01-554-0900 has 3 manufacturer part numbers on file: BX2-1/2NAFN-NHRB (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer), E-4739/BX2-1/2NAFM-NHRB (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer), BXL2-1/2NAFM-NHRB (Dover Pumps & Process Solutions Segment Inc Dba Blackmer Div Blackmer).
Key specifications for E-4739/BX2-1/2NAFM-NHRB: Major Components: PUMP 1, GEAR BOX 1, ELECTRIC MOTOR 1; Part Name Assigned by Controlling Agency: (INAVY) ROTARY PUMP ASSEMBLY-GAS TURBINE FUEL SVC PUMP; End Item Identification: ROTARY PUMP ASSEMBLY. 1 specification is 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.