Milwaukee 1-2" High Speed NPT Universal Pipe Threading Dies - HS for SSOur Universal Pipe Threading Dies are designed for use with our NPT Pipe Threading Die Head w Micro Adjust (49 16 5100). HS for SS. Dies are also compatible with Ridgid Universal Die Heads (NOS. 504A, 711, 713, 811A, 815A, 816, 817, and 842). Stamped size, type, and alignment numbers for easy identification and installation. Threads 1" 2" Pipe Alloy Tool Steel Designed for use with Milwaukee Designed for use in low speed Also Compatible 14 TPI HS for