Threading: Key Inserts

Key insert threading is available for holes on milled parts and turned parts machined from aluminum or brass.

 

Threads Minimum modeled diameter (in.) Maximum modeled diameter (in.) 75% hole drill size (in.) Maximum thread depth (in.)
#8-32 0.133 0.137 0.135 0.400
5/16-18 0.271 0.276 0.274 0.650
3/8-16 0.331 0.336 0.334 1.000
7/16-14 0.396 0.401 0.399 1.000
1/2-13 0.452 0.457 0.455 1.000
Note: Any countersinks required by the specification for the insert you plan to use should be in the CAD model. Thread size shown is the external thread of the key insert.
Threads Minimum modeled diameter (in.) Maximum modeled diameter (in.) 7%% Hole Drill Size (in.) Maximum thread depth (in.)
#10-32 0.160 0.164 0.162 0.600
#12-28 0.186 0.191 0.189 0.600
1/4-28 0.227 0.231 0.229 0.650
Note: Any countersinks required by the specification for the insert you plan to use should be in the CAD model. Thread size shown is the external thread of the key insert.