Binding posts are similar to architectural bolts in that they are designed to be assembled from one side - but they have teeth on the flanged surface to keep them fixed.
1/4 Phillips Flat Tapcon Screws
Fas-n-Tite #12 x 1-1/2-in Ceramic Exterior Wood Screws (75-Per Box) in the Wood Screws department at
Hard-to-Find Fastener 014973211714 Phillips Flat Tapcon Screws, 1/4 x 1-3/4-Inch, 25-Piece : Industrial & Scientific
#10 x 5 Zinc Plated Steel Coarse Thread Phillips Bugle Head All Purpose Screws 38 PCS. 52636
Everbilt 1/4 in-20 x 1 in. Combination Binding Head White Nylon Machine Screw (2-Pack) 814458 - The Home Depot
Zelikovitz 1/4 Chicago Screw Post (0.6 cm) Steel 10pk
Aluminum Screw Posts, 1/4 Aluminum Screw Posts (100 Sets)
Hard-to-Find Fastener 014973445737 Joint Connector Bolts, 1/4-20 x 1.18, Piece-10
Hard-to-Find Fastener 014973211714 Phillips Flat Tapcon Screws, 1/4 x 1-3/4-Inch, 25-Piece : Industrial & Scientific
Zelikovitz 1/4 Chicago Screw Post (0.6 cm) Steel 10pk
Chicago Screws 1/4 Plain 25 Pcs Np Silver: Leathercraft Supplies: : Industrial & Scientific
Hard-to-Find Fastener 014973125943 Phillips Flat Wood Screws, 6 x 1-1/4, Piece-65 : Industrial & Scientific
1/4 Chicago Screw Post (0.6 cm) Stainless Steel 10pk
Midwest Fastener® 1/4 Aluminum Screw Post With Screw - 1 Count at Menards®