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
Plastic Gasket Ring Kit Set Box | Plastic Nylon Ring Gasket Ring - 415/475pc M2 M2.5 - Aliexpress
Amazon.com: M3 M3.5 M4 M5 M5.8 M6 M8 White Plastic Nylon Washer Plated Flat Spacer Seals Washer Gasket Ring (Inner Diameter : M5 x 14 x 0.8mm, Number of Pcs : 50Pcs) :