Seller notes

400ex heavy duty studs 1. need to first drill and tap the cylinder to accept the new studs. Drilling and tapping free hand is not recommended. Please see a machinist or use a drill press or vertical mill. 2. .Studs are 7/16-14 coarse thread. The stud is same as stock above the lower 7/16-14 threads, so, original top hardware can be used again. 3A. For best results use a roll forming thread tap and use a 25/64" tap drill which is a bit tighter than shown by the chart... 13/32". 3B.. Tap dri...

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