The Filter,fluid, cataloged under National Stock Number 4330-01-351-8231, 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 Pnucor Inc Dba Pnucor. Government technical data includes 16 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4330-01-351-8231 |
| Primary Part Number | 3S257-0150-50 |
| Item Name | Filter,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Pnucor Inc Dba Pnucor |
| Status | ACTIVE |
| First Intake Nominal Thread Size | 0.438 INCHES IN |
| First Intake Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) |
| Design Type | REUSABLE |
| Body Outside Diameter | 1.380 INCHES NOMINAL IN |
| Temp Rating | -65.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF |
| First Intake Thread Direction | RIGHT-HAND |
| First Intake Connection Type | THREADED INTERNAL TUBE LINE |
| First Intake Thread Class | 3B |
| Style Designator | INLINE (HYDRAULIC) |
| Operating Pressure | 300.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Filtering Element Quantity | 1 |
| Body Length | 3.220 INCHES MINIMUM AND 3.280 INCHES MAXIMUM IN |
| First Discharge Connection Relationship to Intake Connection | IDENTICAL TO FIRST INTAKE CONNECTION |
| Media for Which Designed | GAS |
| Material | ALUMINUM ALLOY 2024 BODY |
| Mounting Type | INLET CONNECTION AND OUTLET CONNECTION LINE |
| 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 |
|---|---|
| 3S257-0150-50 PRIMARY | Pnucor Inc Dba Pnucor (USA) |
| Reference | Meaning |
|---|---|
| 3S257-0150-50 | 5/9 Secondary reference Pnucor Inc |
NSN 4330-01-351-8231 is a Filter,fluid, manufactured by Pnucor Inc Dba Pnucor, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-351-8231 has 1 manufacturer part number on file: 3S257-0150-50 (Pnucor Inc Dba Pnucor).
Key specifications for 3S257-0150-50: First Intake Nominal Thread Size: 0.438 INCHES IN; First Intake Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF); Design Type: REUSABLE; Body Outside Diameter: 1.380 INCHES NOMINAL IN. 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.