The Filter,fluid, cataloged under National Stock Number 4330-01-253-0556, 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 Atlantic Inertial Systems Limited. Government technical data includes 26 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4330-01-253-0556 |
| Primary Part Number | 283550-1504 |
| Item Name | Filter,fluid |
| FSC / FSG | 4330 / 43 — Centrifugals, Separators, and Pressure and Vacuum Filters |
| Manufacturer | Atlantic Inertial Systems Limited |
| Status | ACTIVE |
| Filtering Media Design | ENCASED ALL FILTERING MEDIA RESPONSES |
| Mounting Hole Quantity | 3 |
| Filtration Rating in Microns | 20.0 ABSOLUTE |
| First Intake Nominal Thread Size | 1.000 INCHES IN |
| Mounting Facility Nominal Thread Size | 0.375 INCHES IN |
| First Intake Thread Series Designator | UNF |
| Design Type | NONREUSABLE |
| Body Outside Diameter | 5.600 INCHES NOMINAL IN |
| Temp Rating | -45.0 FAHRENHEIT MINIMUM AND 225.0 FAHRENHEIT MAXIMUM DEGF |
| First Intake Thread Direction | RIGHT-HAND |
| Body Height | 9.328 INCHES NOMINAL IN |
| Supplementary Features | FILTER P/N 071-60174; RUBBER BUNA N SEALS; RETURN LINE BY-PASS TYPE |
| First Intake Connection Type | THREADED INTERNAL TUBE HEAD SIDE |
| First Intake Thread Class | 2B |
| Style Designator | UNTHREADED SHELL |
| Operating Pressure | 80.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM LOCATION NOT OTHERWISE SPECIFIED LBS |
| Features Provided | AIR BLEED VALVE AND BY-PASS VALVE |
| Filtering Element Quantity | 1 |
| Filtering System for Which Designed | BY-PASS FLOW |
| First Discharge Connection Relationship to Intake Connection | IDENTICAL TO FIRST INTAKE CONNECTION |
| Media for Which Designed | FUEL/OIL, HYDROCARBON |
| Mounting Facility Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Material | STEEL CONTAINER/CARTRIDGE |
| Material | ALUMINUM ALLOY BODY |
| Material | FIBER AND PLASTIC EPOXY FILTERING MEDIUM |
| Mounting Type | THREADED HOLE HEAD |
| 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 |
|---|---|
| 283550-1504 | Atlantic Inertial Systems Limited (GBR) |
| LP025A0000N | Moog Controls Ltd (GBR) |
| Reference | Meaning |
|---|---|
| LP025A0000N | 3/2 Design control — primary reference U.S. Government activity |
NSN 4330-01-253-0556 is a Filter,fluid, manufactured by Atlantic Inertial Systems Limited, classified under FSC 4330, Centrifugals, Separators, and Pressure and Vacuum Filters. Status: active.
NSN 4330-01-253-0556 has 2 manufacturer part numbers on file: 283550-1504 (Atlantic Inertial Systems Limited), LP025A0000N (Moog Controls Ltd).
Key specifications for 283550-1504: Filtering Media Design: ENCASED ALL FILTERING MEDIA RESPONSES; Mounting Hole Quantity: 3; Filtration Rating in Microns: 20.0 ABSOLUTE; First Intake Nominal Thread Size: 1.000 INCHES IN. 26 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.