... washers High strength torsional shear bolt with flange washer and hex head1. Material: low carbon alloy ... ), DIN (Germany), GB (China), UNI, JIS (Japan), ISO and TCVN (Vietnam). steel structrue bolt1.Application:railways, highways, ... etc. Product: BoltsStandard: DIN, JIS, ANSI/SAE/ASME, ISO, BS, AS standard.Diameters Metric: from M6 to M72 ... high strength bolt with flange washer with CE certifation