PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

20256Filter,fluid

Fluid Conditioning Products, Inc. · NSN 1650-00-555-1423 · FSC 1650 · No Item Name Available
Verified by PartsTable
NSN 1650-00-555-1423 — this item is cataloged by the U.S. Government under National Stock Number 1650-00-555-1423. Primary manufacturer part number: 20256.
Features
  • Filter,fluid — FSC 1650
  • First Intake Thread Series Designator: UNF
  • First Discharge Nominal Thread Size: 0.438 INCHES IN
  • First Intake Thread Direction: RIGHT-HAND
  • First Discharge Thread Series Designator: UNF
  • First Intake Connection Type: THREADED EXTERNAL TUBE END
  • Material: ALUMINUM ALLOY SEDIMENT BOWL
  • First Discharge Connection Relationship to Intake Connection: NOT IDENTICAL
Applications
  • Fluid filtration and purification
  • Engine intake air cleaning
  • Hydraulic system protection
  • Applications requiring Aluminum Alloy Sediment Bowl construction
General Description

The Filter,fluid, cataloged under National Stock Number 1650-00-555-1423, is classified within Federal Supply Class 1650 (No Item Name Available) of the Aircraft Components and Accessories group. The primary manufacturer of record is Fluid Conditioning Products, Inc.. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 1 commercial cross-reference from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN1650-00-555-1423
Primary Part Number20256
Item NameFilter,fluid
FSC / FSG1650 / 16 — No Item Name Available
ManufacturerFluid Conditioning Products, Inc.
StatusACTIVE
First Intake Thread Series DesignatorUNF
First Discharge Nominal Thread Size0.438 INCHES IN
First Intake Thread DirectionRIGHT-HAND
First Discharge Thread Series DesignatorUNF
First Intake Connection TypeTHREADED EXTERNAL TUBE END
MaterialALUMINUM ALLOY SEDIMENT BOWL
First Discharge Connection Relationship to Intake ConnectionNOT IDENTICAL
Filtering Element Quantity1
MaterialCOPPER ALLOY FILTERING MEDIUM
First Discharge Connection TypeTHREADED INTERNAL TUBE END
First Intake Nominal Thread Size0.438 INCHES IN
Filtering Media DesignENCASED SINGLE FILTERING MEDIA RESPONSE
Mounting TypeOUTLET CONNECTION LINE
First Discharge Thread DirectionRIGHT-HAND
Filtration Rating in Microns10.0 NOMINAL
Design TypeREUSABLE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
3431-00-086-118013N16 INTERCHANGEABLE
Nozzle,welding
Weldcraft Customer Service
5310-00-223-3162 INTERCHANGEABLE
Washer,flat
5120-00-595-9463 INTERCHANGEABLE
Punch,tube Belling,hand
3815-00-756-147320256 INTERCHANGEABLE
Roller Assembly,cra
Tiffin Parts, L.l.c. Div Subsidiary of Pettibone Corp.
5962-01-099-9799MM54C08J INTERCHANGEABLE
Microcircuit,digital
National Semiconductor Corporation
5945-01-128-125420256 INTERCHANGEABLE
Flasher,thermal
Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems
4820-01-312-8198 INTERCHANGEABLE
Valve,relief,pressure and Temper
6145-01-332-7457T-13447 INTERCHANGEABLE
Cable,power,electrical
Prysmian Cables and Systems Usa, Llc Div Manufacturing Plant
2910-01-343-388620256 INTERCHANGEABLE
Plunger,rotor,fuel Pump
Stanadyne Corporation Dba Stanadyne Diesel Systems
4710-01-343-443320256 INTERCHANGEABLE
Tube,metallic
Sullair Corp
Cross-Reference Index
Part NumberManufacturer
20256 PRIMARY Fluid Conditioning Products, Inc. (USA)
Related Parts
3431-00-086-1180INTERCHANGEABLE
NOZZLE,WELDING
13N16
5310-00-223-3162INTERCHANGEABLE
WASHER,FLAT
5120-00-595-9463INTERCHANGEABLE
PUNCH,TUBE BELLING,HAND
3815-00-756-1473INTERCHANGEABLE
ROLLER ASSEMBLY,CRA
20256
5962-01-099-9799INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
MM54C08J
5945-01-128-1254INTERCHANGEABLE
FLASHER,THERMAL
20256
4820-01-312-8198INTERCHANGEABLE
VALVE,RELIEF,PRESSURE AND TEMPER
6145-01-332-7457INTERCHANGEABLE
CABLE,POWER,ELECTRICAL
T-13447
2910-01-343-3886INTERCHANGEABLE
PLUNGER,ROTOR,FUEL PUMP
20256
4710-01-343-4433INTERCHANGEABLE
TUBE,METALLIC
20256
5330-01-461-8422INTERCHANGEABLE
PACKING ASSEMBLY
591-11500-964-3570/ASY
4820-01-498-9252INTERCHANGEABLE
VALVE,SAFETY RELIEF
2025601S0040

Frequently Asked Questions

What is NSN 1650-00-555-1423?

NSN 1650-00-555-1423 is a Filter,fluid, manufactured by Fluid Conditioning Products, Inc., classified under FSC 1650 (No Item Name Available). Status: active.

What are the part numbers for NSN 1650-00-555-1423?

NSN 1650-00-555-1423 has 1 cross-referenced part number: 20256 (Fluid Conditioning Products, Inc.).

What NSN replaces 1650-00-555-1423?

There are 12 known substitutes for 1650-00-555-1423: 3431-00-086-1180, 5310-00-223-3162, 5120-00-595-9463 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 20256?

Key specifications for 20256: First Intake Thread Series Designator: UNF; First Discharge Nominal Thread Size: 0.438 INCHES IN; First Intake Thread Direction: RIGHT-HAND; First Discharge Thread Series Designator: UNF. 16 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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