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AF4 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

FILTER ELEMENT,INTAKE AIR CLEANE. Key specifications include material: STEEL BODY, body_style: ROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE, design_type: LIMITED, power_rating: 1.0 WATTS AVERAGE, body_diameter: 10.000 INCHES NOMINAL IN, overall_length: 3.375 INCHES NOMINAL IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2940-00-449-7388, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
AF4
NSN: 2940-00-449-7388
FSC: 2940
CAGE: 37099 — LUBER-FINER INC SUB OF CHAMPION LABORATORIES INC AFFIL OF UIS INC (USA)
SPECIFICATIONS
materialSTEEL BODY
body_styleROUND, TERMINAL/TERMINALS IN OPPOSITE SURFACE
design_typeLIMITED
power_rating1.0 WATTS AVERAGE
body_diameter10.000 INCHES NOMINAL IN
overall_length3.375 INCHES NOMINAL IN
frequency_range1.670 GIGAHERTZ MINIMUM AND 1.880 GIGAHERTZ MAXIMUM
mounting_methodCONNECTOR
overall_diameter0.828 INCHES NOMINAL IN
style_designatorCYLINDRICAL W/CLOSED ENDS
application_designTRANSMISSION LINE
body_overall_length2.750 INCHES NOMINAL IN
NSN2940-00-449-7388
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FILTER ELEMENT,INTAKE AIR CLEANE TITLE COMPONENT PN AF4 MFR FILTER ELEMENT,INTAKE
KEY FEATURES
•
STYLE DESIGNATOR: CYLINDRICAL W/CLOSED ENDS
•
BODY OVERALL LENGTH: 2.750 INCHES NOMINAL IN
•
BODY INSIDE DIAMETER: 7.546 INCHES NOMINAL IN
•
DESIGN TYPE: LIMITED
•
BODY DIAMETER: 10.000 INCHES NOMINAL IN
•
MATERIAL: PAPER FILTERING MEDIUM
•
FILTERING MEDIA DESIGN: PLEATED SINGLE FILTERING MEDIA RESPONSE
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORCYLINDRICAL W/CLOSED ENDS
BODY OVERALL LENGTH2.750 INCHES NOMINAL IN
BODY INSIDE DIAMETER7.546 INCHES NOMINAL IN
DESIGN TYPELIMITED
END ITEM IDENTIFICATIONAIRCRAFT,HORNET F/A-18
BODY DIAMETER10.000 INCHES NOMINAL IN
MATERIALPAPER FILTERING MEDIUM
FILTERING MEDIA DESIGNPLEATED SINGLE FILTERING MEDIA RESPONSE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 25
42016Interchangeable
interchangeable cross-reference
interchangeable
42020Interchangeable
interchangeable cross-reference
interchangeable
AN520-8-7Interchangeable
interchangeable cross-reference
interchangeable
42113Interchangeable
interchangeable cross-reference
interchangeable
420E10AInterchangeable
interchangeable cross-reference
interchangeable
FFS107Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AF4?
AF4 is a FILTER ELEMENT,INTAKE AIR CLEANE.
What parts can replace AF4?
There are 25 known substitutes for AF4: 42016, 42020, AN520-8-7 and 22 more. Substitute compatibility should be verified for your specific system.
Is AF4 still available?
AF4 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026