M4 NYLON METRIC PLASTIC WASHERS FLAT A WASHER - DIN 34815
M4 M6 M8 M10 Black and White Plastic Nylon Flat Washer Ring with Good Insulation for Electronic Equipment - China Nylon Washer, Nylon Flat Washe | Made-in-China.com
4mm Black Thick Nylon Plastic WASHERS to Suit M4 Screws & Bolts (25) : Amazon.co.uk: DIY & Tools
Washer Nylon Clear White 9.5mm M4
Nylon Washers Form A Flat Plastic Washer M2.5,M3,M4,M5,M6,M8,M10,M12,M14,M16,M20 | eBay