Grade 43 Proof Coil
Also referred to as Grade 40, System 4 or Grade 4
Grade 43 High Test IS NOT RATED for OVERHEAD LIFTING by OSHA.
Grade 43 High Test Markings
Grade 43 can be marked 4, 40, 43, G4, G43 or simply have anything with a 4 embossed on the link. There may be a letter before the number (like D4 or D43) which is usually a manufacturer’s ID code.
Grade 43 Proof Coil Surface Finishes
Self Colored – also known as SC (for self colored; the chain’s manufacturing process is complete after it gets welded), Shot Peened (a shot blast cleaning technique used by the manufacturers after the welding process), BP (for bright polished; a cleaning technique used by the manufacturers using a tumbler after the welding process)
Hot Dip Galvanized – otherwise known as HDG or Hot Galvanized and provides the best rust proof coating of the three