Amazon.com: 5x White Hexagon Head Screws Polypropylene (PP) Plastic Nuts and Bolts, Hex Head, Washers, M16 x 150mm, Fastener, Water Resistant, Anti-Corrosion, Chemical Resistant, 5/8 x 5 29/32 : Industrial & Scientific
Amazon.com: Piutouyar 20 Pair M5x25mm White Nylon Hex Bolts Plastic Hex Nuts Full Thread Hex Head Screws and Nuts Set : Industrial & Scientific
7/16"-14 x 2-1/4" Nylon Plastic Coarse Thread Hex Bolts — Fastener Line
Plastic Flat Head Machine | Plastic Countersunk Bolt | Nylon Flat Head Machine - Screws - Aliexpress
The Nuts and Bolts of Marine Fasteners | West Marine