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By certification 
Galvanized 8.8 grade hex bolt GB5782 hexagon thread bolts
Hex Bolts are bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. This bolt is compatible with standard nuts and washers of the same thread pitch, grade, and finish.
Quality control
We have QC person stay on the production lines do to the inspection. All products must have been inspected before delivery. We do inline inspection and final inspection.
1.All raw material checked once it arrive our factory.
2.All pieces and logo and all details checked during production.
3.All packing details checked during production.
4.All production quality and packing checked on final inspection after finished.
Our Service
1.More Professional service in Packaging and printing products exporting field
2.Better manufacture ability
3.Various payment term to choose: T/T, Western Union, L/C, Paypal
4.High quality/Safe material/Competitive price
5.Small order available
6.Quickly response
7.More safe and fast transport
8.OEM design for all customers
http://www.ruidufasteners.com/
