Osg 1171900 Straight Flute Tap 7/16-14 Unc Hss

Product Description

The OSG 1171900 is a straight flute plug tap designed for threading operations in a wide range of ferrous and non-ferrous metals. It cuts a 7/16-14 UNC right-hand thread and is manufactured from high-speed steel with a bright, uncoated finish. The plug chamfer - typically 3 to 5 threads - makes it suitable for threading through holes and most standard tapping applications. With 3 flutes and an H3 thread limit, this tap holds close tolerances and works well in hand tapping and machine tapping setups. Machinists and maintenance technicians reach for this tap when a reliable, general-purpose UNC tap is needed for production or repair work.

This tap is well suited for threading aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. It performs in both manual tapping and machine tapping environments. The 3-flute straight flute geometry keeps chips moving in through-hole applications. With an overall length of 3-5/32 inches and a thread length of 1-7/16 inches, it fits standard tap holders and adjustable tap wrenches used in machining and maintenance operations.

Key Features

• 7/16-14 UNC thread form with right-hand direction
• Plug chamfer for general-purpose through-hole and blind-hole tapping
• 3-flute straight flute design for chip clearance in soft to medium-hardness materials
• H3 thread limit for consistent fit class tolerances
• High-speed steel construction for durability across a broad material range
• Bright uncoated finish - ready for use with standard cutting fluids

Compatibility

Compatible with aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces. Fits standard 7/16-14 UNC tap holders and adjustable tap wrenches.

Installation Notes

This tap is installed by machinists and maintenance technicians using standard tap holders, T-handle tap wrenches, or machine tapping chucks. Always secure the workpiece before tapping and use an appropriate cutting fluid for the material being threaded. Align the tap square to the hole before applying torque to avoid tap breakage. Follow shop safety procedures and applicable OSHA machining guidelines when operating tapping equipment.