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BC4A ✓ 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 SWITCH,TELEPHONE,CROSSBAR is a the manufacturer industrial component. Key specifications include unit_type: CHAIN, overall_length: 0.2550 INCHES MINIMUM AND 0.3100 INCHES MAXIMUM IN, mounting_method: BOLT, style_designator: SOLID, EXTERNAL FLANGES BOTH ENDS, body_inside_diameter: 0.2500 INCHES NOMINAL IN, pipe_size_accommodated: 0.125 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5120-00-180-0670, 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
BC4A
NSN: 5120-00-180-0670
FSC: 5120
CAGE: 50893 — RIDGE TOOL COMPANY (USA)
SPECIFICATIONS
unit_typeCHAIN
overall_length0.2550 INCHES MINIMUM AND 0.3100 INCHES MAXIMUM IN
mounting_methodBOLT
style_designatorSOLID, EXTERNAL FLANGES BOTH ENDS
body_inside_diameter0.2500 INCHES NOMINAL IN
pipe_size_accommodated0.125 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
left_flange_outside_diameter0.3750 INCHES NOMINAL IN
right_flange_outside_diameter0.3750 INCHES NOMINAL IN
NSN5120-00-180-0670
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SWITCH,TELEPHONE,CROSSBAR TITLE COMPONENT PN BC4A MFR SWITCH,TELEPHONE,CROSS
KEY FEATURES
•
MOUNTING METHOD: BOLT
•
UNIT TYPE: CHAIN
•
PIPE SIZE ACCOMMODATED: 0.125 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
MOUNTING METHODBOLT
UNIT TYPECHAIN
PIPE SIZE ACCOMMODATED0.125 INCHES MINIMUM AND 4.000 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 21
40180Interchangeable
interchangeable cross-reference
interchangeable
586060-1Interchangeable
interchangeable cross-reference
interchangeable
VI1963Interchangeable
interchangeable cross-reference
interchangeable
7407-25-17Interchangeable
interchangeable cross-reference
interchangeable
3038-1Interchangeable
interchangeable cross-reference
interchangeable
76181Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is BC4A?
BC4A is a SWITCH,TELEPHONE,CROSSBAR.
What parts can replace BC4A?
There are 21 known substitutes for BC4A: 40180, 586060-1, VI1963 and 18 more. Substitute compatibility should be verified for your specific system.
Is BC4A still available?
BC4A is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026