2. OD: from 5/8" to 1-1/8"
3. Grade: C D K
4. Coupling Type: Class T, Class SM
5. Standard: API 11B
6 Use: well drilling
7. Moq: 100 pcs
8. Delivery: within 20 days
9. Payment: TT. L/C at sight
10. Packing: Bundle
11. Certificate: API 11B, ISO 9001, API Q1
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API 11B sucker rod coupling:
Material:
Grade C: SSYD-1
Grade D: 30CrMoA
Grade K: 20Ni2MoA
Usage:
Grade C: suitable for sour medium environment where they are not susceptible to sulphuric stress cracking.
Grade D: suitable for the deeper oil well in the non-corrosion or light-corrosion medium.
Grade K: suitable for light loads and corrosive medium light well.
