Supply GB nut, Yongnian County Bowen fastener is Handan specialized GB nut manufacturers to provide the latest price quotes, as the quality of GB nut processing distribution, the new national standard nut, providing the latest GB nut sales charts, for businessmen to provide strong GB nuts news. Welcome to the new and old customers to visit, to discuss cooperation! In general, the material is good hardenability, hardness of the cross section of the screw portion can be evenly distributed. As long as qualified hardness, strength, and proof stress also can meet the requirements. But when the material is poor hardenability, although checks according to predetermined portions, the hardness is qualified gb GB nut, but the strength and proof stress often below standard. Supply GB nut m8 GB nut, Yongnian County Bowen fastener is Handan specialized GB nut manufacturers to provide the latest price quotes, as the quality of GB nut processing distribution, providing the latest GB nut sales charts, for businessmen to provide strong GB nuts news. Welcome to the new and old customers to visit, to discuss cooperation! Nut test: measuring a micrometer diameter, to detect nut raceway H value, internal thread finish, the reverse bore raceway prejudiced and so on. Oval test raceway, finish and prejudiced tests have taken the reverse hole sampling approach. If the finish is not up or a step line was scrapped. GB old GB nut nut _ _ Bowen GB nut franchise (certified merchants) are provided by Yongnian County Bowen fasteners. Yongnian County Bowen fasteners (www.bwjgj.com) is specialized in "hot galvanized bolts, GB bolts, anchor bolts, studs, PV module bracket bolts" of the enterprise, the company adhering to the "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Guo Zhaofeng.