12 Pcs, Qualtech 5/16"-18 HSS Machine and Fraction Hand Bottoming Tap, DWT54506
$41.90
Size: 5/16"-18; Material: High Speed Steel; Finish: Uncoated (Bright); Style: Bottoming; Cutting Direction: Right Hand HSS Hand Tap, Bottoming, Size: 5/16"-18, Decimal Equivilant .3125-18, Limit H3, Number of Flutes 4