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Deck drain thread data

Serpant

Member
Can anyone tell me what the diameter and the number of threads per inch is for the original Sunfish brass deck drain?
 

L&VW

Well-Known Member
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. ;)
 

Serpant

Member
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. ;)
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.
 

L&VW

Well-Known Member
In examining the deck drain, I noticed it was loose in the deck. (Not secured well by the two small pins). :(

Right at hand was a piece of hardware (a shackle) with the pin of the same external measure. Except that it has just started to rain :confused: I would try to remove the drain from the deck.

One might want to have some resin or THIXO handy. :cool:
 

Serpant

Member
This is my effort at a replacement. You will need a hacksaw,drill gun with 3/32drill and a file . For parts you need a 1/2 13 tpi hex head bolt full thread , 1/2in and 3/4in ‘o’ ring a piece of picture hanging wire.
Cut bolt 5/8in long , drill 3/32 hole up ctr. of bolt 1/2in deep. Heatglue wire in hole, install smaller ‘o’ ring and secure larger to end of about 2in wire. I put slot on bolt head to be able to use coin as screwdriver.
Happy sailing . Nut in picture to simulate deck for ref only
 

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