BOMCO Precision Machinery Plant is the largest and main research & development manufacturing base of oilfield thread gauges, at the same time is the main research & development manufacturing base of oilfield gears for oilfield line equipment, metallurgical industry, shipping industry in China. The oilfield purpose thread gauges designed and manufactured in plant has won the national silver medal in China.

BOMCO Precision Machinery Plant, with forty years' experience of thread gauge design and production in China for the special-purpose thread gauges of petroleum industry. We are the first Chinese company that was awarded the API Spec 7-2 and API Spec 5B certificates. We design and manufacture the master, working and smooth taper gauges for the special-purpose thread gauges of petroleum industry, geological drill pipe, coring tools, ACME thread and buttress thread, as well as the special thread gauges requested by the customers.