kennametal thread adapter 50 mm to 3 4 npsmThe Kennametal boron carbide lined thread adapter converts a 50 mm thread to the 3 4" NPSM thread used on the Kennametal Banana 40 BC nozzle, blast cabinets, and other 3 4" threaded equipment. The adapter has an overall length of 95. 3 mm and a 50. 8 mm (2") outside diameter. The internal boron carbide lining protects the adapter bore from abrasive stream wear, making it suitable for applications with aggressive abrasives where an unlined steel