For use in corrosive or food-handling environments, these hoist rings function just like the more common HR-125M Metric Hoist Ring series, except they're made from 316 stainless steel. Available in capacities from 200 - 6,750 kg and thread diameters from M8 - M48 (larger sizes available upon request). Rated at 100% at 90º. Each hoist ring is proof-tested to 2 times the Working Load limit with certification. They are fatigue rated to 20,000 cycles at 1-1/2 times the Working Load Limit. Each hoist ring also has a Product Identification Code (PIC) for complete material traceability. Top of washer is color-coded silver to quickly identify metric threads.