Cheap And Discounts Hardiron 3/4-16 UNF Machine Thread Tap Right Hand, HSS 3/4 x 16 UNF Straight Fluted Taps Wholesale. Buy Directly From Merchant Hardiron Tools Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.