SAFETY BOLTType B: with hex nut, domed washer and threaded stud Type S: with hex head screw and domed washer Type SK: with countersunk headed screw Grade 8.8 carbon steel, zinc plated and blue passivated A4-80 stainless steel (Type B), A4-70 stainless steel (Type S, SK) Twin-cone heavy duty bolt with cylindrical expansion for increased anchoring security. |