Interstate 04802187 Plug Hand Tap 3/8-16 UNC 4 Flute

Interstate 04802187 Plug Hand Tap, 3/8-16 UNC, 4-flute, with a 10" overall length, is a manual threading tool designed to cut internal threads in holes for standard UNC fasteners, typically used in maintenance, repair, and fabrication tasks where precise, hand-tapped threads are required and wrench-assisted operation is preferred. The plug-style geometry and 4-flute design provide a balance between cutting action and control when used with a tap wrench, enabling you to align the tap square to the hole and advance steadily along the axis to form clean, accurate threads in drilled or prepped holes sized for 3/8-16 UNC fasteners. This Interstate part, identified by number 04802187, is a manual threading accessory whose 10" overall length offers extended reach for deeper holes or workpieces where access is limited, making it a specialized tool for machinists and maintenance technicians who work with inch-series UNC threads.