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Thread Size For The Demco Actuator Replacement Master Cylinder for Drum Brakes # 5650  

Updated 05/09/2024 | Published 05/02/2024

Question:

What is the thread size for the fitting on the Demco Master cylinder? My old one is 1/8th but will not screw into the new one I just received.

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Expert Reply:

Hi Tim,

I reached out to Demco and they stated that the thread size of the Demco Actuator Replacement Master Cylinder for Drum Brakes # 5650 is 3/8" -24 UNF. Demco lists that the brake line kit typically paired up with actuator would come with a .125” MPT X .188” inverted flare fitting (part 05679 in the product manual item list)

expert reply by:
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Kevin C
Tim profile picture

Tim

5/2/2024

I am sorry, I bought the 5652 for disc brakes. Can you confirm this one?

Kevin C. profile picture
Etrailer Expert

Kevin C.

5/9/2024

@Tim There's a master cylinder for disc brakes under part # 5672, but not 5652. The # 5672 has a 3/8" -24 UNF thread size just like the # 5650.

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