... with flange washer and hex head1. Material: low carbon alloy steel,ML20MnTiB2.Property grade: 10.9S3.Surface treatment or finishing: plain, zinc plated ... , galvanized, yellow zinc plated, black oxide, H.D.G,ect.High strength HDG ... 9, A2,A4 Inch.size: Gr2, Gr5,Gr8, A307Surface: SELF COLOUR, BLACK,ZP,YZP,H.D.G, DACROMENTMaterials:high quality ...