• API rotary shouldered
• HI-TORQUE™ (HT™)
• eXtreme™ Torque (XT™)
• Delta™
• XT-M™
• CET
• EVRDRL™
• PTECH™
• PULSAR™
• Double Shoulder (DS)

DELTA™ I HI-TORQUE™ (HT™), eXtreme™ Torque (XT™) I  XT-M™, Z140™, and V150™ are registered trademarks of National Oilwell Varco and its affiliates