Osg 1025201 Straight Flute Tap 10-32 Unf Plug Hss Oxide

Product Description

The OSG 1025201 is a straight flute tap designed for cutting right-hand internal threads to a 10-32 UNF specification. Built from high-speed steel (HSS) with an oxide coating, it produces Class 2B threads with an H3 thread limit, delivering consistent dimensional accuracy on production and repair threading operations. The plug chamfer allows the tap to start easily in through-holes or blind holes with adequate clearance. With a 2.375-inch overall length and a 0.875-inch thread length, it fits standard tap handles and machine tap holders used in job shops, maintenance facilities, and manufacturing environments.

This tap is suited for threading operations in ferrous and non-ferrous metals including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. It performs in both hand-tapping and machine-tapping setups where a straight flute geometry is appropriate for through-holes or materials that produce short, broken chips. The Series 102 designation places it within OSG standard ground tap offerings for general-purpose industrial use.

Key Features

• 10-32 UNF thread form, right-hand thread direction, Class 2B fit
• H3 thread limit for consistent tolerance control across production runs
• Plug chamfer (3-5 thread lead) for easy starting in through-holes and open blind holes
• High-speed steel construction with oxide coating for lubricity and corrosion resistance during service
• 4 straight flutes suited to short-chip materials and through-hole applications
• Coolant-through feature not required — compatible with standard tapping fluids applied externally

Compatibility

Designed for use in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces requiring a 10-32 UNF Class 2B internal thread. Compatible with standard tap handles, tapping attachments, and CNC rigid-tap setups accepting a 0.194-inch shank diameter.

Installation Notes

Secure the workpiece completely before tapping and use a properly sized 10-32 tap drill to prepare the hole. Apply appropriate tapping fluid or cutting oil for the material being threaded to extend tap life and improve thread quality. When hand-tapping, periodically reverse the tap to break chips and prevent binding. Inspect the tap for chipping or wear before each use — a damaged tap can seize in the hole or produce out-of-tolerance threads.