24Pc Unf/Unc Alloy Tap Die Set Alloy Steel Sizes: 1'' Od-,1/4 Nc 20,1/4 Nf 28,5/16 Nc 18,5/16 Nf24, 3/8 Nc 16,3/8 Nf 24,7/16 Nc 14,7/16 Nf 20,1/2 Nc 13, 1/2 Nf 20,1/8 Npt 27 Die Stock Tap Wrench Metal Case.
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