The Filter,fluid, cataloged under National Stock Number 4330-01-328-5585, is classified within Federal Supply Class 4330 (Centrifugals, Separators, and Pressure and Vacuum Filters) of the Pumps and Compressors group. The manufacturer of record is Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division. Government technical data includes 14 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-328-5585 |
| Primary Part Number | 51PNU-BI-ML-50-XX-1 |
| Item Name | Filter,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division |
| Status | ACTIVE |
| Mounting Hole Quantity | 4 |
| Filtration Rating in Microns | 15.0 NOMINAL |
| Design Type | REUSABLE |
| First Intake Connection Type | UNTHREADED INTERNAL TUBE BOTTOM |
| Style Designator | HIGH PRESSURE THREADED BODY |
| Mounting Hole Diameter | 0.563 INCHES NOMINAL IN |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Features Provided | BY-PASS VALVE |
| Filtering Element Quantity | 1 |
| Filtering System for Which Designed | FULL FLOW |
| First Intake Nominal Inside Diameter | 1.375 INCHES IN |
| First Discharge Connection Relationship to Intake Connection | IDENTICAL TO FIRST INTAKE CONNECTION |
| Media for Which Designed | FUEL/OIL, HYDROCARBON |
| Mounting Type | UNTHREADED HOLE BOTTOM |
| 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 |
|---|---|
| 51PNU-BI-ML-50-XX-1 PRIMARY | Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division (USA) |
NSN 4330-01-328-5585 is a Filter,fluid, manufactured by Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-328-5585 has 1 manufacturer part number on file: 51PNU-BI-ML-50-XX-1 (Parker-Hannifin Corporation Dba Hydraulic Filter Division Div Hydraulic & Fuel Filter Division).
Key specifications for 51PNU-BI-ML-50-XX-1: Mounting Hole Quantity: 4; Filtration Rating in Microns: 15.0 NOMINAL; Design Type: REUSABLE; First Intake Connection Type: UNTHREADED INTERNAL TUBE BOTTOM. 14 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.