C’ bore Coarse bore---This has a tolerance class of 7H for internal threads and 8g for external threads ) [% _& D' t% k% ?SHCS Screw hole countersunk head e" Y) I, u& w* {: ]6 Q
¼ Major Dia. Of threads . inch" p! l5 M0 F( p" p3 M. e
: J" ]# t5 ]. Q- f- e
#1, drill hole Dia. 5.7192mm
第一个貌似讲述的是,钻1/4内六角螺钉(Socket Head Cap Screw)使用的沉头孔(Counter Bore),钻到图示的深度# h# P) i# u( ]
第二个貌似讲的是一个不太紧的紧配合(Loose Press Fitting)孔的尺寸参考第一张零件图。' Z! c# I7 P' O# r
(仅供参考)