Hangzhou Qianjiang Hardware and Electronic Co.,Ltd offers a unique specialization in the manfauring of precision assembly staring from OD 5.00 mm to OD100mm with tolerance of ?0.01mm.we do internal as weel as ecternal threading of all types and all size in ranging from M 5to M75 in case of metric threads from1/4" to 2" in case of BSP BSPT and NPT threads with the help of our thread copying machine .Years of experience allow Tecomet to timely process your precision components and critical assemblies, eliminating design iterations and accelerating time-to-market.