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Single Lock Tappet - Ford Model A 1928-1931
$ 21.99
Part Number: A-6500-SL
Single lock tappets are easier to adjust than double locks because you only need to have 2 wrenches to adjust instead of 3. With single locks, you just need one wrench to hold the tappet and the other to adjust the self-locking bolt that adjusts your clearance.