T-311 Support Plate / Shim Gauge (. 100" +/- .0005) Small and Large Bolt Pattern Helical 7 Series: XX708LL, XX709, XX710, XX715 RTLO XX713, XX718 (Use 3/8" -16 NC Cap Screws) FRO (2 series): XX210 (Use Metric Cap Screws)
T-315 Support Plate / Shim Gauge (.125" +/- .0005) Large Bolt Pattern Type 6 (Spur Gear) Series: RTLO XX610A, XX610B, XX613, Super 10 RTOXX613, XX618
T-311, T-315, & T-321 center hole uses a standard bolt. (12mm X 1.75 X 70mm FRO (2 Series) All others use 3/8" - 16 X 2 3/4")
Larger Bore with left hand threads is the drive for the speedometer. It is not used with these tools.
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