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Technical Data Sheet
PartsTable / COMPONENT / 66-7685US
66-7685US ✓ 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: COPPER ALLOY, body_style: PLAIN, corner_shape: SQUARE ALL CORNERS, overall_length: 1.625 INCHES NOMINAL IN, surface_finish: 125.0 MICROINCHES OUTSIDE, body_inside_diameter: 5.607 INCHES MINIMUM AND 5.611 INCHES MAXIMUM IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-139-3956, 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
66-7685US
NSN: 4320-00-139-3956
FSC: 4320
CAGE: 09647 — AQUA-CHEM, INC. (USA)
SPECIFICATIONS
materialCOPPER ALLOY
body_stylePLAIN
corner_shapeSQUARE ALL CORNERS
overall_length1.625 INCHES NOMINAL IN
surface_finish125.0 MICROINCHES OUTSIDE
body_inside_diameter5.607 INCHES MINIMUM AND 5.611 INCHES MAXIMUM IN
body_outside_diameter6.000 INCHES MINIMUM AND 6.001 INCHES MAXIMUM IN
material_document_and_classificationMIL-B-16221,GR 3 MIL SPEC SINGLE MATERIAL RESPONSE
NSN4320-00-139-3956
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available FILTER ELEMENT,INTAKE AIR CLEANE TITLE COMPONENT PN 66-7685US MFR FILTER ELEMENT,INTAKE
KEY FEATURES
•
SURFACE FINISH: 125.0 MICROINCHES LEFT FACE
•
CORNER SHAPE: SQUARE ALL CORNERS
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-B-16221,GR 3 MIL SPEC SINGLE MATERIAL RESPONSE
•
MATERIAL: COPPER ALLOY
•
BODY INSIDE DIAMETER: 5.607 INCHES MINIMUM AND 5.611 INCHES MAXIMUM IN
•
BODY STYLE: PLAIN
TECHNICAL CHARACTERISTICS (FLIS)
SURFACE FINISH125.0 MICROINCHES LEFT FACE
SURFACE FINISH125.0 MICROINCHES OUTSIDE
CORNER SHAPESQUARE ALL CORNERS
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-16221,GR 3 MIL SPEC SINGLE MATERIAL RESPONSE
MATERIALCOPPER ALLOY
OVERALL LENGTH1.625 INCHES NOMINAL IN
BODY INSIDE DIAMETER5.607 INCHES MINIMUM AND 5.611 INCHES MAXIMUM IN
BODY STYLEPLAIN
SURFACE FINISH125.0 MICROINCHES INSIDE
SURFACE FINISH125.0 MICROINCHES RIGHT FACE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
949524Interchangeable
interchangeable cross-reference
interchangeable
PA-1904Interchangeable
interchangeable cross-reference
interchangeable
70667685Interchangeable
interchangeable cross-reference
interchangeable
066-07685-000Interchangeable
Same NIIN cross-reference
interchangeable
66-7685Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 66-7685US?
66-7685US is a FILTER ELEMENT,INTAKE AIR CLEANE.
What parts can replace 66-7685US?
There are 5 known substitutes for 66-7685US: 949524, PA-1904, 70667685 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 66-7685US?
66-7685US is cataloged in the Federal Logistics Information System (FLIS) under NSN 4320-00-139-3956. This indicates validated use in U.S. government and defense supply chains.
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PartsTable Design LLC · partstable.com
Last verified: July 2026