Vx39 Heavy Duty Plastic Thread Protector For Drill Pipe - SHAANXISENWELLPETROLEUM ( China ) - Offers to Sell and Export - Friday 20 July 2018 2:09 am - vx39 heavy duty plastic thread protector for drill pipe roduct specification standard api 5dp material heavy duty plastic size nc26~ nc50 or equivalent application protection for drill pipe thread...