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A12-3 is a 7/16" x 24 tpi fully threaded male steel nut - SAE flare

7/16
Price: $2.00
In Stock
Part Number: A12-3
Most popular size of master cylinder nut.
7/16" x 24 tpi male fully threaded steel nut - .550” long.
SAE flare (45 degree inverted/double)
Uses 7/16” wrench.
American thread master cylinder brake line nut for use with 3/16” OD tubing with SAE flare.
As the name implies, this is found most often at the master cylinder, but the A12-3 is also found on the back axle of some full size Ford trucks and other places.
Use with 3/16" brake line

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