... &API 3.high quality, best price 4.cover all IADC code1 Specifications: Size8 1/2”(215.9MM)IADC517Bearing TypeElastomer sealed journal bearingThread Connection4 ... /8”),133.3mm(5 1/4”),139.7mm(5 1/2”),142.8mm(5 5/8”),149.2mm(5 7/8”)152.4mm ... (6”),155.5mm(6 1/8”),158.7mm(6 1/4”),161.9mm(6 3 ... (8 3/8”),215.9mm(8 1/2”),222.2mm8 3/4”) 241.3(9 1/2”),244.4(9 5/8”),250.8(9 7/8”)269 ...