Bolts and nuts as in the attached inquiry (1) Material of above items should be L7 Alloy Steel. Each set should consists two hexagonal heavy nuts. Bolts Material: ASTM A320 GR. L7 Nuts Material: ASTM A194 GR.4 (2) Thread should comply with ANSI B1.1 Class 2A and Class 2B (3) Profile should be smooth (4) Nuts should comply with ANSI B18.2.2 hexagonal heavy nuts regulation. (5) Please indicate Brand and catalogue