(15) 1/2" BOLT ON, a top quality brass threaded tube 1/2" diameter, supplied complete with polished brass washers (91 o/d), brass nuts and plastic backing washers make these our top of the range fasteners. 1/2" x 1” Order Ref. 1/1 – £1.49p 1/2" x 1.5 Order Ref. 1/1.5 – £1.63p 1/2" x 2” Order Ref. 1/2 - £1.94p