Description
HSS 7pcs/set Imperial Cap Screw Counter bore set
Including: No6 - No8 - No10 - 1/4" - 5/16"- 3/8" - 1/2" sizes
suit Counter boring the above size Cap Screws
all straight shank
No 6 counter Bore head .228" pilot .150" OL length 3"
No 8 counter Bore head .280" pilot .170" OL length 3"
No 10 counter Bore head .302" pilot .200" OL length 3.1/2"
No 1/4" counter Bore head .376" pilot .280" OL length 5"
No 5/16" counter Bore head .466" pilot .342" OL length 5"
No 3/8" counter Bore head .555" pilot .405" OL length 6"
No 1/2" counter Bore head .720" pilot .530" OL length 7.1/2"
made from solid M2 HSS