I need some 10mm long countersunk machine screws for Pegler Belmont lockshield radiator valve caps but can't work out the size and Pegler have ignored my requests. M4 is too thin and M5 too thick. Can't find any to match up in the shops. Anyone know which imperial size comes between the two? Would it be 3/16" (nearest equivalent to 4.5mm)? I'm not sure how imperial screws are measured.
- posted
17 years ago