Osg 2402703 Straight Flute Tap 10-32 Unf Plug 2B Hss

Product Description

The OSG 2402703 is a straight flute machine tap designed to cut 10-32 UNF internal threads in aluminum and cast iron workpieces. It features a plug chamfer for through-hole and moderately deep blind-hole applications and is manufactured from vanadium high-speed steel with a nitride coating to extend tool life under repeated use. The 2B class of fit and H3 thread limit ensure threads meet standard tolerance requirements for most fastener assemblies. With an overall length of 2.375 inches and a 0.875-inch thread length, the 2402703 is sized for use in standard hand-tap and machine-tap operations across production and maintenance environments.

This tap is suited for threading operations in light manufacturing, fabrication shops, and maintenance facilities where 10-32 UNF threads are required. The straight flute geometry is effective in through-hole applications and short blind holes where chip evacuation is manageable. It is appropriate for use in manual tapping handles, drill press setups, and CNC tapping cycles running at speeds appropriate for vanadium HSS tooling. Typical materials include aluminum and cast iron, as specified by the manufacturer.

Key Features

• Vanadium high-speed steel construction for improved wear resistance over standard HSS
• Nitride coating reduces friction and extends tool life in repetitive tapping operations
• Plug chamfer suits through-hole and moderately deep blind-hole threading
• H3 thread limit and 2B class of fit for standard fastener-grade thread tolerance
• Right-hand thread direction, 3 flutes, 32 threads per inch
• No coolant-through design; compatible with standard cutting fluid applied externally

Compatibility

Designed for cutting 10-32 UNF threads in aluminum and cast iron. Compatible with standard tap holders and collets accepting a 0.194-inch shank diameter. Part of the OSG Series 240 straight flute tap line.

Installation Notes

This tap should be installed by a machinist or qualified technician in a properly aligned tap holder or CNC spindle to prevent cross-threading and tool breakage. Ensure the workpiece is securely fixtured before beginning the tapping operation. Apply an appropriate cutting fluid for the workpiece material to reduce heat buildup and extend tap life. For blind-hole applications, verify hole depth is sufficient to accommodate the plug chamfer lead before the full thread form engages.