| After-sales Service: | Yes |
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| Warranty: | 1 Year |
| Manufacturing Process: | Casting |
| Surface Treatment: | Galvanized |
| Material: | Alloy |
| Transport Package: | Wooden Case |
| Samples: |
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| Customization: |
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Suppliers with verified business licenses
Audited Supplier Two different grades of Sucker Rod Couplings are available: T and SM. The manufacturing process of both the grades is the same with cold worked pre-stressed, roll-formed threads with the anti-galling coating. This process results in stronger/fatigue resistant threads.
The manufacturing inspection, the dimensions and the tolerances of the couplings match or exceed the specifications of the latest API standards.
Polished rod couplings are used to connect polished rod . Spray metal SM sucker rod couplings are better in anti-corrosion than common sucker rod couplings. Slim hole and full size couplings are available
| Full Size Polished Rod Coupling | |||||
| Size (in) | Coupling O.D. W (mm) (+0.13, -0.25) | Length L (mm) (+1.57, -0.00) | Nominal Diameter of Thread (in) | Vanish Cone | Hardness (HRA) |
| 5/8" | 38.10 | 101.6 | 15/16" | 9° | 56-62 |
| 3/4" | 41.28 | 1-1/16" | |||
| 7/8" | 46.00 | 1-3/16" | |||
| 1" | 55.60 | 1-3/8" | |||
| 1-1/8" | 60.33 | 114.3 | 1-9/16" | ||
| Slim Hole Polished Rod Coupling | |||||
| Size (in) | Coupling O.D. W (mm) (+0.13, -0.25) | Length L (mm) (+1.57, -0.00) | Nominal Diameter of Thread (in) | Vanish Cone | Hardness (HRA) |
| 5/8" | 31.75 | 101.6 | 15/16" | 9° | 56-62 |
| 3/4" | 38.10 | 1-1/16" | |||
| 7/8" | 41.30 | 1-3/16" | |||
| 1" | 50.80 | 1-3/8" | |||
Dongying Zhaoxin Industry and Trade Co.,Ltd is an ISO-9001, ISO-14001, OHSAS-18001 certified company and has all the quality systems in place for design, planning,manufacturing and quality monitoring & traceability to ensure that Dongying Zhaoxin Industry and Trade Co.,Ltd products match the highest quality & reliability Standards similar to any International major in this field.
Dongying Zhaoxin Industry and Trade Co.,Ltd with perfect attitude, product and service, is going to make further development together with customers at home and abroad .
Suppliers with verified business licenses
Audited Supplier 
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