fasteners,bolts,nuts, (1).Standard:DIN931/933 ,ANSI,BSW,JIS. (2).Size:M5-M20;1/4"-5/8" (3).Material:carbon steel Our products are ... .Carbon steel and stainless size of fasteners:M6-M45,1/4''-1-3/4'' Norm;ASME,DIN,JISB,GB,ISO. Such as:square bolts, hex bolts ... , T bolts, fastener, threaded rods,carriage bolts, carbon steel bolts