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Thanks Janet, but that still doesn't make a 3/8" bolt an option for stair treads. The bolt diameters listed are 1/2" through 1 1/2" I've never seen anything except 3/8" stair tread bolts, and I can't imagine the need for a 1 1/2" stair tread bolt.ThanksDan
When using a type 1 (grating) stair tread the smallest tread
mounting hole is 9/16" for a 1/2" bolt. How do i change the
holes to 7/16" for 3/8" bolts which is how our stair treads
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