RIDGID 12-r Threading Die For Three Eighths Inch Copper Pipe

RIDGID 12-R 3/8 in NPT threading die head for copper pipe delivers precise 3/8" NPT threads when used with RIDGID's 12-R manual pipe threaders. This alloy-steel die head is designed for right-hand threading and produces 3/8‑18 NPT connections, a common size for copper piping fittings. The head can be reversed in the die head for close-to-wall threading, enabling threading in tight spaces. For compatibility, this 12-R head is part of RIDGID's 12-R line of manual threaders, and the 3/8" dies are typically paired with the 12-R head to complete the threading setup (dies in this size are often sold separately as 37820). Copper piping applications—such as connecting copper supply lines or refrigeration copper lines—benefit from the standard NPT thread profile produced by this head, offering repeatable, dependable threaded connections in residential and commercial plumbing work. The combination of alloy steel construction and RIDGID engineering provides durability for repeated use across projects, with a focus on maintaining thread integrity in tight spaces and ensuring consistent fit with standard fittings.