Description: Coupling nut is also called extension nut, or coupler, used to connect two male threads, the outside of coupling nut is mostly a hex, so the coupling nut we mostly see is hex coupling nut or hex coupler.
Strictly complies with ISO9001:2008 system, Each production process be well managed through self inspection, routing inspection by our workers. Our test equipments include: tensile machines, hardness tester, salt spray tester, Image measurement instrument, caliper, GO & NO-GO guage, etc.
Test and issue Material Test Report and Inspection Report by Hengrui before shipment to guarantee the product quality. The test report from the third parts are also avaliable as customer's requirments.