Three possibilities Ray.
(1) Cain guessed you had hard chrome kingpins already fitted as supplied by him from Mulfab with metric internal thread matching his flanged bolts.
(2) He is now supplying flanged bolts to match the OE kingpins with ½" BSF (I think) internal threads.
(3) They won't fit although comparison with original will show obvious difference - in which case you will need to re-use originals.
BTW just noticed your location not so far from me and often visit Woolpit for cheapest fuel. If you need any help just PM.
