API 7/8" Class T Slim Hole Sucker Rod Coupling

1)Type: FH class T coupling /SH class T coupling
2)Material: High quality Carbon steel AISI 5I40
3)Standard: API Spec 11B
4)Smoothness: 3.1× 10-3
5) Hole rate: 2%
6)Basic Hardness: HRC 16-23
7)Coupling diameter: 5/8", 3/4 ", 7/8". 1", 1-1/8"
8)Main specification of 7/8" SHT sucker rod coupling
Weight: 0.52kg
O. D.: 1-5/8"(41.3mm)
Length: 4in(101.6mm)

API 7/8" Class T Slim Hole Sucker Rod Coupling