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Technical Data Sheet
B3870 ✓ Verified by PartsTable
· COMPONENT
WHAT YOU NEED TO KNOW
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Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The LINING,FRICTION is a the manufacturer industrial component. Key specifications include width: 4.000 INCHES NOMINAL IN, material: ASBESTOS FRICTION LINING, thickness: 0.500 INCHES NOMINAL IN, arc_length: 104.094 INCHES NOMINAL IN, lining_style: SEGMENT PLAIN, minor_radius: 21.000 INCHES NOMINAL 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 3950-00-312-6623, 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
B3870
NSN: 3950-00-312-6623
FSC: 3950
CAGE: 49185 — TEREX AMERICAN CRANE CORP (USA)
SPECIFICATIONS
width4.000 INCHES NOMINAL IN
materialASBESTOS FRICTION LINING
thickness0.500 INCHES NOMINAL IN
arc_length104.094 INCHES NOMINAL IN
lining_styleSEGMENT PLAIN
minor_radius21.000 INCHES NOMINAL IN
application_typeDRY
attachment_methodRIVETED
features_providedRIGID FRICTION LINING
fabrication_methodMOLDED
strengthening_featureINTERNALLY MOLDED-IN REINFORCEMENT
hole_arrangement_styleDOUBLE EVEN
NSN3950-00-312-6623
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available LINING,FRICTION TITLE COMPONENT PN B3870 MFR LINING,FRICTION
KEY FEATURES
APPLICATION TYPE: DRY
ATTACHMENT METHOD: RIVETED
LINING STYLE: SEGMENT PLAIN
THICKNESS: 0.500 INCHES NOMINAL IN
FABRICATION METHOD: MOLDED
STRENGTHENING FEATURE: INTERNALLY MOLDED-IN REINFORCEMENT
FEATURES PROVIDED: RIGID FRICTION LINING
ARC LENGTH: 104.094 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
APPLICATION TYPEDRY
ATTACHMENT METHODRIVETED
LINING STYLESEGMENT PLAIN
THICKNESS0.500 INCHES NOMINAL IN
FABRICATION METHODMOLDED
STRENGTHENING FEATUREINTERNALLY MOLDED-IN REINFORCEMENT
FEATURES PROVIDEDRIGID FRICTION LINING
ARC LENGTH104.094 INCHES NOMINAL IN
MINOR RADIUS21.000 INCHES NOMINAL IN
HOLE TYPE AND QUANTITY108 COUNTERBORED
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
B3870-1Interchangeable
interchangeable cross-reference
interchangeable
B-3870Interchangeable
interchangeable cross-reference
interchangeable
55918PC117Interchangeable
Same NIIN cross-reference
interchangeable
54954PC117Interchangeable
Same NIIN cross-reference
interchangeable
55202PC46Interchangeable
Same NIIN cross-reference
interchangeable
54940PC46Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B3870?
B3870 is a LINING,FRICTION.
What parts can replace B3870?
There are 9 known substitutes for B3870: B3870-1, B-3870, 55918PC117 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B3870?
B3870 is cataloged in the Federal Logistics Information System (FLIS) under NSN 3950-00-312-6623. This indicates validated use in U.S. government and defense supply chains.
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