What size T-slot nutsbolts do I want to get for the 20x20 Aluminum

Steel T-Slot Bolt: M8 x , 22 mm Thread Length, 8 mm Slot Width, Black Finish

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m88 slot online These all-metric threaded M6 or M8 T-slot bolts have 18 x 12mm heads and are zinc plated They are a direct fit into UJK T-Track in the UJK Track and Stop Kit,

m89 slot Buy T Slot Bolts from IBK Engineers Pvt Ltd for best price at Rs 30 Piece Find Company contact details & address in Bangalore, Karnataka