... type male adapter x female thread1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTB type female coupler ... Stainless steelBSPP,BSPT,NPTDC typedust cap1/2" ~ 8"Polypropylene,Nylon,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTDP typedust plug1/2 ... " ~ 8"Polypropylene,Nylon,Aluminum,Brass,Stainless steelBSPP,BSPT,NPTOther related product: ...