Counterbored Holes Dimensions Chart (inch)


USA SOCKET-HEAD CAP SCREWS


Screw dia.


Counterbore dia.


Counterbore depth


Countersink dia.


Clearance dia. (normal fit)


Clearance dia. (close fit)


#0


1/8


.060


.074


#49


#51


#2


3/16


.086


.102


#36


3/32


#4


7/32


.112


.130


#29


1/8


#5


1/4


.125


.145


#23


9/64


#6


9/32


.138


.158


#18


#23


#8


5/16


.164


.188


#10


#15


#10


3/8


.190


.218


#2


#5


1/4


7/16


.250


.278


9/32


17/64


5/16


17/32


.312


.346


11/32


21/64


3/8


5/8


.375


.415


13/32


25/64


7/16


23/32


.438


.483


15/32


29/64


1/2


13/16


.500


.552


17/32


33/64


5/8


1


.625


.689


21/32


41/64


3/4


1 3/16


.750


.828


25/32


49/64


7/8


1 3/8


.875


.963


29/32


57/64


1


1 5/8


1.000


1.100


1 1/32


1 1/64


1 1/4


2


1.250


1.370


1 5/16


1 9/32


1 1/2


2 3/8


1.500


1.640


1 9/16


1 17/32


1 3/4


2 3/4


1.750


1.910


1 13/16


1 25/32


2


3 1/8


2.000


2.180


2 1/16


2 1/32