Chrome Rocker bolt with UNF thread. Original Rocker cover bolts are dull zinc coated or painted but the chrome type look much better and cheaper.
A longer threaded version
CAM6823 was used on prestige Minifin alloy type A series rocker covers such as Vanden plas 1300 and MG Metros only to find themselves sought after for any under bonnet upgrade or where a longer bolt is required for certain rockers covers or the fitting of silicon rocker cover gaskets.
See also the
GMK039K chrome washer and
GM040K. Also see
SAC71L kit.