by size

sucker rod coupling is made according to API, and the surface hardness is HRC50-65, the basic hardness is HRC16-23, it has three functions: wear-proof, corrosion-resisting and....

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API sucker rod coupling has three functions: wear-proof, corrosion-resisting and reducing the friction, the raw material is good quality steel alloy, guochuijie( at) hotmail.com

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API sucker rod coupling has three functions: wear-proof, corrosion-resisting and reducing the friction, the raw material is good quality steel alloy, guochuijie( at) hotmail.com

dermined by size

sucker rod coupling is made according to API, the type is 5/ 8, 3/ 4, 7/ 8, 1, 1-1/ 8 for full size and slimhole, the raw material is good quality steel alloy.

50RMB

sucker rod coupling is made according to API , and the raw material is good steel alloy 40cr, it has three functions: wear-proof, corrosion-resisting and reducing the frictiong.msn....