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Technical Data Sheet
PartsTable / COMPONENT / 1B4891
1B4891 ✓ 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 BRUSH,ELECTRICAL CONTACT is a the manufacturer industrial component. Key specifications include color: GRAY/GREY, width: 0.875 INCHES NOMINAL IN, length: 0.675 INCHES NOMINAL IN, material: STEEL, thickness: 0.250 INCHES NOMINAL IN, top_style: FLAT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2925-01-423-4962, 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
1B4891
NSN: 2925-01-423-4962
FSC: 2925
CAGE: 77445 — RTX CORPORATION DBA PRATT & WHITNEY DIV PRATT &WHITNEY (USA)
SPECIFICATIONS
colorGRAY/GREY
width0.875 INCHES NOMINAL IN
length0.675 INCHES NOMINAL IN
materialSTEEL
thickness0.250 INCHES NOMINAL IN
top_styleFLAT
body_styleRECTANGULAR COMMUTATOR
case_styleRECESSED
seal_width0.912 INCHES NOMINAL IN
constructionNONCOLLAPSIBLE
door_quantity2
hole_diameter0.152 INCHES NOMINAL IN
NSN2925-01-423-4962
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BRUSH,ELECTRICAL CONTACT TITLE COMPONENT PN 1B4891 MFR BRUSH,ELECTRICAL CONTA
VERIFIED SUBSTITUTES & CROSS-REFERENCES 8
MB-1912Interchangeable
interchangeable cross-reference
interchangeable
4630-4Interchangeable
interchangeable cross-reference
interchangeable
463-00Interchangeable
interchangeable cross-reference
interchangeable
40355-1 PIECE 29Interchangeable
interchangeable cross-reference
interchangeable
DV-1060Interchangeable
interchangeable cross-reference
interchangeable
SW27020Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1B4891?
1B4891 is a BRUSH,ELECTRICAL CONTACT.
What parts can replace 1B4891?
There are 8 known substitutes for 1B4891: MB-1912, 4630-4, 463-00 and 5 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1B4891?
1B4891 is cataloged in the Federal Logistics Information System (FLIS) under NSN 2925-01-423-4962. 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