They are sold individually or in sets. Thread Size M10 x 2.00. They are a handy addition to the tool box of any serious engine builder and an essential aid to preparing any block for final assembly.
ARP 912-0004 Thread Chaser, 11 mm x 1.25 in Male Thread, Steel, Zinc Oxide
ARP 912-0004 Thread Cleaning Chaser Tap M11 X 1.25 Steel Each
ARP 444-1102 Header Bolts .750 in UHL 5/16 in Thread Universal Hex
ARP 100-1212 Header Bolts 1.000 in UHL 3/8-16 in Thread Universal 12-Point
ARP 400-1210 Header Bolts 1.000 in UHL 3/8-16 in Thread Universal 12-Point
ARP 400-1112 Header Bolts 1.000 in UHL 3/8-16 in Thread Universal Hex
