Besly X1604HS-GH4 Hand Tap from Besly Cutting Tools is a hand tapping tool designed for creating internal threads in metal parts. The HS in the model code indicates high-speed steel construction, a material attribute documented in Besly’s catalog listings, such as Besly taps described in major supplier catalogs as high-speed steel tooling. The X1604HS-GH4 designation identifies its placement within the X1604 family and denotes its GH4 variant within that lineup.
