Image Image NK-Series Japanese Pneumatic Male Threaded Plug Markets Maintenance Repair Operations (MRO) Product Options Part Number Length Maximum OD Body Size Thread Thread Size Pipe Thread Material NK2BM2 1.54" 0.52" 1/4" BSPT 1/4" BSPP / BSPT Steel NK2M2 1.54" 0.52" 1/4" NPT 1/4" NPT / NPTF Steel