... -M20*Length Nut sizes:M3-M30 Washer sizes:M4-M16 non-standard part with high quality and competitive priceBolt sizes:M3-M20 ... ,Gr12,Gr23Application:chemical industry,aerospace,spaceflight,surgical implants,as the parts of manufacturing the cars/bikes/motorcycles.Main use of this ... ,motorcycle,car,especially racing bicycle,racing car,racing motorcycle. Precision non-standard part