Innovative Components ANH1-HEX5S3A 1.75" Snap Lock Star knob hex hole to accept 1/4" nuts and bolts, black pp (Pack of 10)

Innovative Components ANH3-HEX5S3A 1.75" Snap Lock Star knob hex hole to accept 3/8" nuts and bolts, black pp (Pack of 10)

E-Z Lok 400-4 Threaded Insert, Brass, Knife Thread, 1/4"-20 Internal Threads, 0.500" Length (Pack of 25)

Innovative Components ANH1-HEX5S2- 1.38" Snap Lock Star knob hex hole to accept 1/4" nuts and bolts, black pp (Pack of 10)

E-Z Lok Threaded Insert, Zinc, Hex-Flush, 1/4"-20 Internal Threads, 0.512" Length (Pack of 100)

Hard-to-Find Fastener 014973243890 Full Thread Hex Tap Bolts, 1/4-20 x 3, Piece-100

Innovative Components AN4C-5S3L-21 1.75" Star Knob thru hole  1/4-20 steel zinc lock nut black pp (Pack of 10)