Butterfield 10-11060, 1011060 GH-4 1-12 N.F. Hand Tap Kit

Union Butterfield 1011060 GH-4 1-12 NF Hand Tap Kit is a three-tap set for manual internal threading in metal, including taper, plug, and bottoming taps. Each tap is made from high-speed steel with a bright finish, sized for 1" diameter holes with 12 threads per inch (National Fine), and features four flutes with straight-flute, right-hand cutting geometry. The taps carry a GH4 thread-limit designation to ensure compatibility with standard 1"-12 NF holes, enabling reliable progression from entry through full thread depth to the bottom of a blind hole. This 1"-12 NF set is well-suited for general machine shop tasks, repairs, and fabrication where durable internal threads are required in materials such as steel, aluminum, and cast iron; the taper and plug taps prepare the hole and the bottoming tap finishes threads to the full depth in through or blind applications. When you need precise, hand-cut internal threads for fasteners, this Butterfield kit provides a ready-to-use, quality solution for fastening, repair, and assembly work.