... 3.Grade:4.8 ,6.8,8.8... Rivet,blind rivet,rivet nut 1.What’s the specification of our Products ... than 20 years experiences in screw,bolt,nut,washer,rivet, stud, pin,wrench and so on .2. ... quality 1.We have strict quality control from producing to delivery.Our company had strong technology support, ... most of places such as drywall,concrete,chipboard,machine,wood...2)Main export market:North America,South ...