API sucker rod couplings

Sucker Rod Coupling & Sub Couplings & Polished Rod Coupling

Standard: API Spec 11B

Size: 5/8", 3/4", 7/8", 1", 1-1/8"

Length: 4", 4.5"

Grade: T & SM

1. Sucker rod coupling

Size: 5/8", 3/4", 7/8", 1", 1-1/8"

Grade: T, SM

Characters: Couplings and slim hole couplings

2. Sub coupling Size: 5/8"-3/4", 3/4"-7/8", 7/8"-1", 1"-1-1/8"

Grade: T, SM

Characters: Connecting two sizes of sucker rod or connecting sucker rods and polished rods

3. Polished rod coupling Size: 5/8", 3/4", 7/8", 1", 1-1/8"

Grade: T, SM

Character: 9º degree cone

4. Slim hole coupling Size: 5/8", 3/4", 7/8", 1"

Grade: T, SM

Characters: Slim hole sucker rod couplings, polished rod couplings and sub-couplings