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API SUCKER ROD COUPLINGS, OIL DRILLING EQUIPMENT
Made in full accordance with API SPEC 11B, the couplings are high in quanlity and reasonable in price. API 1” Class SM Full Size Sucker Rod Coupling 1) Material: AISI 5140 2) Standard: API Spec 11B 3) Main specification: OD:2-3/16" (55.56mm) ID: 1-3/8"(34.93mm) Length: 4" (101.6mm) Weight: 1.13kg4)Other Size: 5/8"; 3/4"; 7/8"; 1-1/8"5)Smoothness: 3.1*10-3 6)Coat Thickness(in): 0.01in ~ 0.02in 7) ...
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