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B166 ✓ 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

The BEARING,ROLLER,NEEDLE is a the manufacturer industrial component. Key specifications include material: STEEL OVERALL, corner_shape: SQUARE INSIDE LEFT CORNER, flange_width: 1.8750 INCHES NOMINAL IN, bore_diameter: 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN, overall_width: 0.3650 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN, alignment_type: RIGID. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4920-00-570-4883, 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
B166
NSN: 4920-00-570-4883
FSC: 4920
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialSTEEL OVERALL
corner_shapeSQUARE INSIDE LEFT CORNER
flange_width1.8750 INCHES NOMINAL IN
bore_diameter0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN
overall_width0.3650 INCHES MINIMUM AND 0.3750 INCHES MAXIMUM IN
alignment_typeRIGID
overall_length2.5625 INCHES NOMINAL IN
special_featuresEXTRA CAPACITY OUTER RING
style_designatorNON-SEPARABLE, OPEN END, DRAWN SHELL
body_inside_diameter0.3115 INCHES MINIMUM AND 0.3125 INCHES MAXIMUM IN
fsc_application_dataTEST SET,RECORDER-REPRODUCER SET,SOUND,ACFT
body_outside_diameter0.4950 INCHES MINIMUM AND 0.5050 INCHES MAXIMUM IN
NSN4920-00-570-4883
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BEARING,ROLLER,NEEDLE TITLE COMPONENT PN B166 MFR BEARING,ROLLER,NEEDLE
KEY FEATURES
•
FSC APPLICATION DATA: TEST SET,RECORDER-REPRODUCER SET,SOUND,ACFT
TECHNICAL CHARACTERISTICS (FLIS)
FSC APPLICATION DATATEST SET,RECORDER-REPRODUCER SET,SOUND,ACFT
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
B166AInterchangeable
interchangeable cross-reference
interchangeable
217-3703Interchangeable
interchangeable cross-reference
interchangeable
4500166-6Interchangeable
interchangeable cross-reference
interchangeable
C659-55Interchangeable
interchangeable cross-reference
interchangeable
B166Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B166?
B166 is a BEARING,ROLLER,NEEDLE.
What parts can replace B166?
There are 5 known substitutes for B166: B166A, 217-3703, 4500166-6 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B166?
B166 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4920-00-570-4883. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026