... to sucker rod:API 11B sucker rod:1.Grade: C, K, D, KD2.Size: 5/8", 3/4", 7/8", 1", 1 ... of API SPEC 11B size and type sucker rod can be available. We can also manufacture sucker rod as per client's ... to sulfide stress cracking, suitable in sour medium.5. Grade D sucker rod: Made of quality heat treated steel alloy, with ...