... special fastener field .1,Name:Metal machining and stamping insert;metal insert;machining and stamping insert 2,For the similar insert ... ,4140,G51150,etcStainless steel201,202,301,302,303,304,316,310,430,etcBrassC28000,C37710,C3450,C27200,etcBronzeC51900, ... P.S:For us,the most competitive industry is machined hardware fastener ,especially the cutting/turning parts. Metal machining and stamping insert ...