Drill String Cross-over Sub

Applicationt: 

Oil drilling

Production Description:

According to API Specification, Drill String Cross-over Sub is made from AISI4145H modified chromium molybdenum alloy steel. ZSSC has manufactured three types of subs: Straight OD Subs, Reduced Section Subs and Left Hand Subs. All threads are cold rolled, copperized, and phosphated.