How to make T- slot bolts workshop DIY project

T Slot Bolts , Accessory for Profile Systems m8 t slot bolts Anyone have an idea where I can get nylon bolts & nuts that work on a spoilboard? I'm hoping to find some rectangular nuts that won't m8win slot Steel T-Slot Bolt: M8 x , 22 mm Thread Length, 8 mm Slot Width, Black Finish

m8 slot Stockist of Stainless Steel T Slot Bolts, Threaded T Bolt, Check avaliable sizes of M8 T Track Bolts ; 18 M 16 63 – 45 100 – 63 160 – 100 ; 22 M 20 80