Hole depth is the key to achieving a flush installation
and preventing excess plastic from forming on
the threads at
the bottom of the insert. Countersinks should not be
molded into a hole where an insert is to be installed.
inserts have a pilot or “lead-in” diameter
that assures proper alignment of the insert during installation,
as well as a counterbore or countersink at each end of
the insert for easy installation of the mating screw.
alterations in hole sizes be necessary, please
contact our Engineering Department for technical
there are two types of molded holes referred to in this
catalog. The "straight hole" has a maximum of a 1° taper
or 1/2° per side. The "tapered hole" has
an approximate 8° included angle.