Replacement Pipe Die Compatible Pipe Size 1/4 in to 3/8 in Compatible Material Type Aluminum Galvanized Steel Steel Thread Type NPT Compatible Thread Direction Right Hand Die Material High Speed Steel Die Head Compatibility Ridgid Machine Universal Compatible Threader Series 1215 1224 300 535 Application Pipe Number of Dies 4 Threads Per Inch 18 Compatible Threader Type Threading Machine Compatible Die Head Grainger Part Number 4CW40 4Z974 5A195