Pipe Thread Die, 1 In, HSS, 4 PcMfr #: 37880 High speed manual pipe cutting die delivers quick and precise threading Pipe die features 11 1 2 TPI and 12R NPT for mechanical and low pressure applications 1 inch (25 mm) alloy cast die is ideal for use with the RIDGID line of manual pipe threading machines Pipe die produces exacting right hand directional threads on metal pipes that measure up to 1 2 inch (12 mm) NPS, creating clean 14 TPI This NPT pipe die is covered by a lifetime