STANDARD AND METRIC SAFETY SWIVEL HOIST RINGS 200% PROOF-LOAD TESTED WITH SERIAL NUMBER FOR TRACEABILITY SWIVELS 360 - PIVOTS 180 MATERIAL: AIRCRAFT QUALITY ALLOY (180 KSI TENSILE STRENGTH MININUM) SAFETY SWIVEL HOIST RING STRENGTH, FINISH: BLACK OXIDE PER MIL SPEC ALSO AVAILABLE: CADMIUM PLATED, ELECTROLESS NICKEL PLATED, ZINC PLATED SAFETY FACTOR: 5:1 MAGNETIC PARTICLE INSPECTED CERTIFIED HEAT TREATMENT RATED AT 100% FROM 0~90 FATIGUE TESTED TO 20,000 CYCLE AT 1-1/2X THE RATED LOAD MEETS OR EXCEEDS THE REQUIREMENTS OF ASME B30.26 THREAD: LONGER THREAD PROJECTION AND FINE THREAD AVAILABLE