TIRE SCREWS AND THREADED INSERTS
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1/8th mile ET      # of screws per side

7.51 or Slower                      6

6.51 - 7.50                             8

5.51 - 6.50                            12

4.75 - 5.50                            16

Faster than 4.75     Double Beadlock Wheels
                                     Recommended                    

SAFETY FIRST: Remember that tire screws are NOT intended to be an alternative to beadlock wheels.  Tire screws should not be used on vehicles that can exceed 200 mph in the quarter mile or 150 mph in the eighth mile. 
If you are at a total loss regarding how many tire screws to use per side of your wheels, refer to the table below for typical examples based on 1/8th mile ET’s. 
Stainless Steel Insert
160 KSI, Buttonhead Machine Screw with a Fully Threaded Tip

It is strongly recommended that Vibra-Tite VC3 be used on both the inserts and the screws.  This is a non-anaerobic formula that works great with aluminum, stainless steels, plastics and other inactive materials.  Vibra-Tite VC3 has to be applied to the threads and then allowed 30 minutes to dry before use.  Once it is applied and cured, the hardware can be stored indefinitely without any degradation of the product.
Installation requires a 6.8mm drill bit and a 5/16-24 tap.
Screws and Inserts can also be purchased individually for custom applications.

Vibra-Tite VC3 original works to resist air leakage at fastening points by acting as a dam between mated threads.  In addition to sealing the threads, VC3 prevents fasteners from loosening under the stress of prolonged shock and vibration.  VC3 works on the principle of
"friction through viscosity".  VC3 is used on the U.S. Army's main battle tank and many other military and aerospace applications.
Download and Review the instructions above before purchasing.

Above, Josh Henline is on his way to a 7.80, 180 MPH pass at one of Milan's "Run What Ya Brung" events.  Josh uses 16 screws on each side of his Weld wheels.  Eight (8) .250' long inserts with (8) 3/4" long screws are installed through the extra thick section of the rims and eight (8) .175' long inserts with (8) 5/8" long screws are installed at an angle in the thinner section of the bead.  Josh did a nice job on the installation as you can see below.  As an additional bonus, switching to these tire screws and inserts allowed Josh to save an additional .23 lbs of rotating mass compared to sheet metal screws.
Ask questions or make comments about tire screws and inserts by clicking on the FASTIP Racing link.