Name

Size

Grade

Characters

Sucker rod coupling

5/8”, 3/4”, 7/8”,1”, 1-1/8”

T, SM

Couplings and slim hole couplings

Sub coupling

5/8”-3/4”, 3/4”-7/8”, 7/8”-1”, 1”-1-1/8”

T, SM

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

Polished rod coupling

5/8”, 3/4”, 7/8”,1”, 1-1/8”

T, SM

9º degree cone

 Slim hole coupling

5/8”, 3/4”,7/8”, 1”

T, SM

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