RIDGID 51005 Model 819 Nipple Chuck Kit, 1/2-Inch to 2-Inch NPT Nipple Threader for Use with 300 Power Drive, 300 Compact, Models 535, 1224, and 1822 (with Adapter) Pipe threading accessory holds short or close nipples for threading. Nipple threading kit for threading nipples of 1/2-inch to 2-inch NPT For use with pipe threading machines such as the 300 Compact, 535, 1233, and 1224 or 300 Power Drive, and with the 839 Adapter, the 819 can be used with the 535A and 1822. Includes BSPT adapters for 1/2-inch to 1-1/2-inch Model 819 Nipple Chuck is also available in a BSPT configuration.