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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: 1.13kg
4)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)Basic hardness: HRC 16-23
8)Surface Hardness: HRC 55-62
9)Bonding Strength(Mpa): 484
API SM drive rod coupling
Yantai Yunsheng Petroleum Machine Accessory Co., Ltd
sucker rod coupling, sub coupling, polished rod coupling, pony rod coupling
