API 5CT Coupling AddThis Sharing Buttons Share to FacebookFacebookShare to TwitterTwitterShare to LinkedInLinkedInShare to PinterestPinterestShare to ...AddThis Whole phosphating, or inside phosphating and outside coating coupling Send InquiryChat Now Product Details: Detail information Place of Origin Tianjin, China (Mainland) Brand Name China Petroleum Equipment Model Number 1.9"-20" Type Coupling Machine Type Oil production Certification API Material Alloy steel Processing Type Turning Surface treatment Whole phosphating, or inside phosphating and outside coating Usage Internally threaded cylinder for joining two lengths of threaded casing pipe Specification ItemType Casing coupling Tubing coupling Specification 4-1/2", 5", 5-1/2", 6-5/8", 7", 7-5/8", 8-5/8", 9-5/8", 10-3/4", 11-3/4", 13-3/8", 16", 18-5/8", 20" 1.9", 2-3/8", 2-7/8", 3-1/2", 4", 4-1/2" Steel grade J55, K55, L80, N80, P110 J55, L80, N80 Thread type STC, LTC, BTC