Precision steel hydraulic fitting with plating zinc,We fabricate metal parts over 5.000. ... ,Height gages,Depth gages.4, thread gages,ring threads gages with many sizes,NPT,NPTF,BSPP,BSPT,NH,M...5,projection meter ... layer thickness gauge8,Many go.no-go pins. Precision steel hydraulic fitting with plating zinc is available.