Threading: Key Inserts

Key inserts are available for threaded holes on milled parts.

 

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.