Thread Rolling Screw
Thread Rolling Screws can lower the cost of assembly operations several
ways. They improve the speed of assembly, reduce operator fatigue
and strip-out problems, eliminate the need to pre-tap holes and cross
The unique point and body design provide superior forming pressure relief which lowers driving torque. The thread forming screws forming relief feature extends all the way up into the body where the circumference of the threads are at their largest diameter. Lower driving torque allows drivers to drive screws faster and reduces operator fatigue.
Lo-Driv Screw Design
sharp starting thread.
tapered area with forming relief indentions.
thread length, non-round area with a circumscribing diameter equal
to the completely round threads of Zone IV.
round, complete threads to the head.
As soon as the
relief area of the Lo-Driv thread passes through the assembly, the driving
torque drops almost to zero. All of the driver's energy is then converted
into high clamping force, which keeps assemblies tight during use. This
helps to reduce repair and warranty costs associated with loosening screws.
Screws are driven into drilled or cast holes of the correct size they
create strong, tightly mating internal threads. The screws can not cross
thread when driven because they create their own mating threads in the
assembly. The 360° body contact of Lo-Driv Screws is highly resistant
to stripping out when being seated.
meet all of the requirements of the following specifications: IFI-112,
SAE J81, GM6171M and Ford ES21003-S100.
Data for hole size specifications.