Outside steel and inside plastic for PIN, inside steel and outside plastic for BOX, and CNC threaded to provide excellent performance in all API tests. ASM thread protectors are now widely used by OCTG mills.
Contact:Bonnie Xu
Email:BonneXu@dlpoctg.com
Mob/Wechat:86+13602055205
SKYPE:BonnieXu22
Linkedin:BonnieXu
