M58 helicoids: what is the pitch?

[redivivus]

Newbie here. I'd like to mate a M58 helicoid to a rafcamera made M58x0.75 to Fuji FX adapter: https://www.rafcamera.com/adapter-m58x0-75f-to-fuji-x I see ads for M58 helicoids both on Amazon and on Ebay but I have a hard time figuring what is the pitch of the adapters since both M58x1 and M58x0.75 are used in photography.

For instance Amazon sells a "Pixco M58 to M58 Mount Lens Adjustable Focusing Helicoid Macro Tube Adapter 17mm to 31mm". Is the pitch M58x1 or M58x0.75?

Any hints or pointers to M58x0.75 helicoids much appreciated! Thank you-- Red

[calvin83]

Most if not all are M58x1. You can ask the seller too.

[kds315*]

Both are available on the market, however hardly any seller tells (or even knows) what they are selling!!

[dickb]