Osg 1045102 Straight Flute Tap 8-32 Unc Plug 3B Hss

Product Description

The OSG 1045102 is a straight flute plug tap designed to cut internal 8-32 UNC threads in a wide range of ferrous and non-ferrous materials. Built from high-speed steel, this tap delivers consistent thread quality in production and maintenance applications. The plug chamfer - with several lead threads tapered to ease entry - makes it suitable for through holes and moderately deep blind holes. At 2.125 inches overall length with a 0.75 inch thread length, the 1045102 is sized for standard hand-tap and machine-tap use on fastener-scale work. The H2 thread limit ensures close tolerance control for 3B class of fit requirements.

This tap is suited for threading 8-32 UNC holes in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. It fits into typical production tapping operations as well as field maintenance and repair work where 8-32 machine screw threads are required. The right-hand, 3-flute configuration handles chip management in these materials without the need for coolant-through tooling, making it practical for manual tapping and light CNC or drill-press tapping cycles.

Key Features

• Plug chamfer for easy thread entry in through holes and open blind holes
• High-speed steel construction for durability across a broad range of workpiece materials
• H2 thread limit for consistent 3B class of fit tolerances
• 3-flute design balances chip evacuation and tool strength at this thread size
• No coolant-through required, compatible with standard tapping fluids applied externally
• Right-hand thread direction matches standard 8-32 UNC fastener convention

Compatibility

Designed as a standard replacement or production tap for 8-32 UNC threading operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces requiring a 3B class of fit.

Installation Notes

Tapping operations should be performed by a machinist or qualified technician using a tap wrench, tapping head, or CNC tapping cycle appropriate to the workpiece material. Ensure the tap is properly aligned perpendicular to the workpiece surface before beginning the cut to avoid tap breakage or thread distortion. Apply a suitable cutting fluid for the workpiece material to extend tap life and improve thread finish. Back the tap out periodically to clear chips when working in deeper or blind-hole applications.