LC long round N80 casing coupling

Specification: 4-1 / 2 "5" 5-1 / 2 "6-5 / 8" 7 "7-5 / 8" 8-5 / 8 "10-3 / 4" 11-3 / 4 "13-3 / 8"
Steel grade: n80-1 n80-q
Buckle type: LTC long round casing coupling
Main parameters: the product complies with API 5CT / 5B standard.