Posted by JasonB on 04/01/2022 15:05:38:
1/4" whit may well do are they an exact imperial size or 0.525"
Edited By JasonB on 04/01/2022 15:06:36
Yay ! Didn't think of that – £3.50 on eBay, ordered.
Thanks to all who pointed this out and for the replies,