Heavy duty aluminium weld-on radiator neck to accept standard diameter, standard reach automotive caps. It has an 1/8”-27 NPT port for the overflow and is supplied with a hose tail adapter to accept 5/16" (8mm) I.D. hose. Additionally we can supply overflow fittings to 3, 4.75, 6, & 10mm hose tails or AN-3 & AN-4.
O.D.: 56.5mm
Centre Bore:28mm
Weight: 83gms
Overflow Port: 1/8 NPT