Uit rail nuts

[Carlklu5]

Does anyone known where I can get some M6 or even M8 uit t nuts?

 

[OldStock]

Not sure what thread, but I'd start here.

Site Search | ant-supplies Website Product Finder

www.ant-supplies.uk

--edit--
Actually looking at the results, looks to be mainly M-Lok sorry about that

 

[Pete2]

I use T-nuts and flatten the sides on a grinding wheel to suit the rail width

 

[OldStock]

T-NUT FOR UIT RAIL (£5.99 INC VAT) | PRS

SOLD IN SINGLES Ideal for DIY projects such as adding hamsters, weights and hand stops to standard UIT rails. Machined aluminium Standard metric M5x0.8 thread

www.pr-s.co.uk

M5, unless you want to drill and tap?

T - sliding block for UIT ski end

T - sliding block for UIT rail, fits on all sporting rifles, which is a so-called UIT rail (also hand stop Rails called) have.

tec-hro.de

M5

SE ShootingEquipment | SE UIT nut | purchase online

SE UIT nut - UIT nut length 20mm

www.shootingequipment.de

Looking at m4 holes, going M8 will break the body of the nut, cause a weak spot, M6 might be OK but I wonder why you would need a big thread, it's not like to can hang 100kg off it?