drilling of work hardening grades of stainless steel 43760

Lifting Rings part number 43760 from ACTEK Manufacturing & Engineering, part of ACTEK's Hoist Rings line. Specifications: Rated load 12000 lbs; Thread size 1 1/4" - 7; Material Alloy Steel; Finish Black Oxide|Cadmium Plated; Torque 470 ft-lbs; Safety Factor 4.1; Swivel Angle 360°; Pivot Angle 180°; Weight 11.5 lbs; Type D Ring; Thread Protrusion - (E) 2.5 in; Color Yellow. Dimensions: A = 3 1/4 in, B = 6 in, C = 3 in, D = 1 1/8 in, F = 3.9in. Manufacturer technical notes: ACTEK ® MFG. & ENG. INC. LIFTING DEVICE. SAFETY INFORMATION. Actek® Mfg. & Eng. Inc. products are intended for use only by trained, qualified, and experienced personnel. Misuse of any Actek®. product or lack of supervision and inspection can lead to serious accidents including death. Actek® Mfg. & Eng. Inc. has always. stressed that safety is of utmost importance. Prior to any use of Actek® product, evaluation of the product application, safety precautions, safe working load, and control of all field. conditions is mandatory. Avoid applications that exceed the safe working load or any other product misuse. Actek® cautions you that. all safety factors shown are approximate. Safe working loads should never be exceeded under any circumstances. If you have any questions about the proper use or installation of any Actek® product, please contact our office directly. Manufacturer documentation: Lifting Ring Safety Precaution.