Thread Specifications: M2,M3,M4,M5,M6,M8,M 10,M 12,M 14,M 16,M 18,M20,M22,M24. washers are the standard form A pattern (most common). Stated sizes (M ) are the bolt size which the washers fit; Hence the hole sizes are slightly larger to allow clearance.
eBay
【Multiple sizes 】：nylon washers, which are available in black or white. You have the option to select size M2 M3 M4 M5 M6 M8 M10 M12 M14 M16. 【Material 】：Nylon T-shaped washer is made of quality nylon material, with excellent insulation, abrasion resistance,thermal insulation and non-magnetic properties, and light weight.
eBay
M8 X 25mm ~ 8.4mm i/d ~ 25mm o/d ~ 2mm thick. M12 X 40mm ~ 12.5mm i/d ~ 40mm o/d ~ 3mm thick. M10 X 30mm ~ 10.5mm i/d ~ 30mm o/d ~ 2mm thick. M4 x 12mm ~ 4.3mm i/d ~ 12mm o/d ~ 1mm thick. M6 x 18mm ~ 6.4mm i/d ~ 18mm o/d ~ 1.6mm thick.
eBay
Type: Spacers Standoff. Size: M3 M4 M5 M6 M8. Material: ABS Plastic. We Sincerely Hope That You Can Receive the Goods As Soon As Possible.
eBay
Material: Nylon. Color:Black / White. Due to various reasons such as lighting differences such as shooting scenes and techniques,the actual color of an item may differ slightly from the images displayed on the website.
eBay
50 x M8 16 1.4mm Washer. 50 x M4 9 1mm Washer. 50 x M2 5 1mm Washer. 50 x M2.5 5 1mm Washer. 50 x M6 12 1.2mm Washer. 50 x M5 10 1mm Washer. 50 x M3 8 1mm Washer. Material: Nylon.
eBay
10 of each size - M4 M5 M6 M8 M10. M8 x 16mm (o/d) x 1.6mm thick. M10 x 20mm(o/d) x 2.0mm thick. M6 x 12mm (o/d) x 1.5mm thick. sizes M1.6 - M6 in A2 & A4 Stainless Steel. M5 x 10mm (o/d) x 1.0mm thick (2BA).
eBay
Size: M2 M3 M4 M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24. Material: Nylon.
eBay