SQ4 Sludge Trap - threadform and size?

[paul.ptak]

Does anyone know off-hand the threadform and size of the sludge trap screws used on the SQ4? Part number 1190-37.

I need 8 of these screws, Draganfly is on back order, but believe I may be able to source the correct screws from a hardware specialist here in the USA.

Thanks for your help.

Paul

[simon.holyfield]

1/4" BSC I think. I may have some old ones, I'll have a look.

They are about 1/4" long, csk screws.

[paul.ptak]

1/4" BSC I think. I may have some old ones, I'll have a look.

They are about 1/4" long, csk screws.

Thanks Simon.

I have the originals somewhere...I know I placed them in a zip-loc bag and put the bags in a safe place as to not lose them...such a safe place I can't find them now.

[JohnnyBeckett]

HI get in touch with the club sq4 spares and i think he will help you with what you need

[Knud.Degnbol]

I'm rather sure, it is cycle thread. 1/4 x 26TPI.

[paul.jameson]

Knud is correct. 1/4 x 26tpi cycle. But you need to reduce the diameter of the threads immediately under the end of the countersink of the head down to the thread root diameter or you will not be able to "bottom" the countersink into the crankshaft.

[rschurr]

……... But you need to reduce the diameter of the threads immediately under the end of the countersink of the head down to the thread root diameter or you will not be able to "bottom" the countersink into the crankshaft.

This advice came a little too late for me, had great problems to set the screws properly

Rudy