Carbon Steel Hand Taps with straight flutes are designed for general purpose hand tapping or in production machines where ground thread accuracy and performance are not required. They can also be used for rethreading damaged threads. Carbon Steel Hand Taps are the most cost effective threading tap availableWe use special sand-blast machinery to make surface more smooth and good looking for sales. STC091, HAND TAPS. ASME/ANSI B94.9HSS Ground Thread, Carbon Steel Cut Thread, Please specify when ordering.7-10 Thread Chamfer3-4 Thread Chamfer1-2 Thread ChamferTAPERPLUGBOTTOMINGSizePitch (TPI)Thread LimitedTotal LengthThread LengthSizePitch ( TPI)Thread LimitedTotal LengthThread LengthUNCUNFUNSUNCUNFUNS0-80H1, H21-5/8"5/16"3/8"1624H2, H32-15/16"1-1/4"16472H1, H21-11/16"3/8"7/16"1420H33-5/32"1-7/16"25664H21-3/4"7/16"1/2"1320H2, H33-3/8"1-21/32"34856H21-13/16"1/2"9/16"1218H33-19/32"1-21/32"4404836H21-7/8"9/16"5/8"1118H33-13/16"1-13/16"54044H21-15/16"5/8"3/4"1016H34-1/2"2"63240H2, H32"11/16"7/8"914H3, H44-11/16"2-7/32"83236H2, H32-1/8"3/4"1"81214H3, H45-1/8"2-1/2"102432H2, H32-3/8"7/8"1-1/8"712H3, H45-7/16"2-9/16"122428H2, H32-3/8"15/16"1-1/4"712H45-3/4"2-9/16"1/4"2028H2, H32-1/2"1"1-3/8"612H46-1/16"3"5/16"1824H2, H32-23/32"1-1/8"1-1/2"612H46-3/8"3"Note: Please write ’SIZE" , "PITCH" & "THREAD LIMITED" when ordering. Such as "8-64 H2".