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Technical Data Sheet
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42A49 — Technical Data Sheet

✓ Verified by PartsTable
— · MRO · MRO_GENERAL
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 CONNECTING BLOCK is a the manufacturer industrial component. Key specifications include general_characteristics_item_description: C/O 4 BRASS INSERTS; 4 TERMINALS; 1 PLASTIC COVER EQUIPPED WITH A CAPTIVE SCREW. This part is cataloged in the Federal Logistics Information System under NSN 5940-00-242-2838, 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
MRO→ MRO_GENERAL→ 42A49
NSN: 5940-00-242-2838
FSC: 5940
CAGE: 64959 — AMERICAN TELEPHONE AND TELEGRAPH CO (USA)
SPECIFICATIONS
general_characteristics_item_descriptionC/O 4 BRASS INSERTS; 4 TERMINALS; 1 PLASTIC COVER EQUIPPED WITH A CAPTIVE SCREW
NSN5940-00-242-2838
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available CONNECTING BLOCK TITLE COMPONENT PN 42A49 MFR CONNECTING BLOCK
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
40C9-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
3Y9342ACInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
3Y31125400ACInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
55-0146-1InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
PAS-346InterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
39-MInterchangeableGOVERNMENT REGISTRY
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLEDGOVERNMENT REGISTRY
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 42A49?
42A49 is a CONNECTING BLOCK. It is classified as a MRO (MRO_GENERAL).
What parts can replace 42A49?
There are 17 known substitutes for 42A49: 40C9-1, 3Y9342AC, 3Y31125400AC and 14 more. Substitute compatibility should be verified for your specific system.
Is 42A49 still available?
42A49 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: October 2026