Can anyone tell me what the diameter and the number of threads per inch is for the original Sunfish brass deck drain?
Thanks for your prompt reply.Looking on the web the standard set screw seems to be 1/2 13 tpi so I will pick one up and try next time at lake. With COVID it might be still a few weeks but will let you know.Outside thread measure is .5 inch.
'Hard to measure just two threads here, but maybe 10/11 threads per inch. (tpi)
Hardware stores carry "set screws" of the correct pitch and tpi for Sunfish. I don't know of an exact duplicate for Sunfish, but a straight cut can be made in the hardware store piece, which may be Allen-head. If only found in steel, wrap with Teflon tape.
They're available in nylon, but don't know of a supplier--aside from Grainger. Let me know what you find, and I'll add it to my signature-line.