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Item NameGr5 ASME/ANSI B 18.3.4M BoltClassScrew,nut,bolt,washer,thread rod,etc.GradeGR1、GR2、GR3、GR4、GR5、GR7、GR11、GR12、GR23;StandardASME/ANSI B 18.3.4MSizeM8SurfacePolishing, Anodizing, Black oxide,Colored Test Ultrasonic test (UT)PackingWooden CaseApplicationChemical, Industry, Petroleum, Aircraft