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B542 ✓ 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

RESISTOR,VARIABLE,WIRE WOUND,NON. Key specifications include material: FIBER AND RUBBER BODY, bore_diameter: 1.3125 INCHES NOMINAL IN, load_direction: RADIAL, inner_ring_width: 0.2810 INCHES NOMINAL IN, outer_ring_width: 0.2500 INCHES NOMINAL IN, performance_type: HIGH CAPACITY. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 4920-00-113-9998, 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
B542
NSN: 4920-00-113-9998
FSC: 4920
CAGE: 98897 — LOCKHEED MARTIN CORP (USA)
SPECIFICATIONS
materialFIBER AND RUBBER BODY
belt_quantity2
bore_diameter1.3125 INCHES NOMINAL IN
load_directionRADIAL
inner_ring_width0.2810 INCHES NOMINAL IN
outer_ring_width0.2500 INCHES NOMINAL IN
performance_typeHIGH CAPACITY
style_designatorPLAIN
cross-sectional_sizeB
nominal_pitch_length55.800 INCHES IN
strengthening_featureSTEEL CORD
overall_outside_diameter1.7500 INCHES NOMINAL IN
NSN4920-00-113-9998
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available RESISTOR,VARIABLE,WIRE WOUND,NON TITLE COMPONENT PN B542 MFR RESISTOR,VARIABLE,WIRE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
B54SC2Interchangeable
interchangeable cross-reference
interchangeable
B54-2Interchangeable
interchangeable cross-reference
interchangeable
BW54-2Interchangeable
interchangeable cross-reference
interchangeable
556-3543Interchangeable
interchangeable cross-reference
interchangeable
PB26395-1Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is B542?
B542 is a RESISTOR,VARIABLE,WIRE WOUND,NON.
What parts can replace B542?
There are 5 known substitutes for B542: B54SC2, B54-2, BW54-2 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for B542?
B542 is cataloged in the Federal Logistics Information System (FLIS) under NSN 4920-00-113-9998. 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