This heavy duty wall anchor requires a 10mm hole in the masonry. It has a serrated flange nut (of adequate size for wall bracket fixing holes) and therefore does not need a separate washer. SWL is approx 300kG and recommended torque is 8 to 10lb/ft (both in concrete).
Note that 4 anchors are req for a standard wall bracket and 5 (or more) for a pair of T & Ks.
P&P is cheaper for this item if you phone the order through !