... 1994,We are specialize in produce all kinds of precision cnc non-standard machining parts(nuts,bolts,fasteners,ctc.), ... to the drawing you posted. 1 Service OEM service offered as the customers`drawing,samples2 Casting material cast iron,ductile iron,grey ... roughness tester,impact test machine,pressure tester,altimeterWe can provide Custom Fabrication Services ,you are welcome to send your technology ...