Protection should be free from solvents (such as diesel oil, acetone, a hydrocarbon solvent, trichlorethylene), stored fat buckle with the impact or the thread grease. Thread protector design, material and mechanical properties should be able to protect the threads and pipe end damage Ning thread protectors in normal handling and transportation, to prevent thread during the normal course of transportation and storage of dust and water infiltration. During normal storage should be approximately one year. Protector of the thread form should make the product thread protectors and will not damage plastic thread protectors plastic thread protectors _ positive Tong Machinery (Online) _ thread protectors provided by Ning County is Tong Machinery Plastic Co., Ltd. _ Plastic thread protectors positive Tong Machinery (Online) _ thread protector is Ning County is Tong Machinery Plastic Co., Ltd. (www.dzztjx.com) this year introduced a new upgrade, the above picture is for reference only, please dial this page Phone or pictures on obtain the latest information, contact: song manager.