‹› Image Image NK-Series Japanese Pneumatic Female Threaded Plug Markets Maintenance Repair Operations (MRO) Product Options Hide lower priority columns Part Number All NK2BF2NK2F2Length All 1.39"Maximum OD All 0.52"Body Size All 1/4"Thread All BSPPNPTThread Size All 1/4"Pipe Thread All BSPP / BSPTNPT / NPTFMaterial All Steel NK2BF2 1.39" 0.52" 1/4" BSPP 1/4" BSPP / BSPT Steel NK2F2 1.39" 0.52" 1/4" NPT 1/4" NPT / NPTF Steel