Osg 1019800 Straight Flute Tap 8-32 Unc Hss Plug

Product Description

The OSG 1019800 is a straight flute plug tap designed for cutting 8-32 UNC internal threads in a wide range of ferrous and non-ferrous materials. Manufactured from high-speed steel with a bright uncoated finish, it features 3 flutes and a plug chamfer that distributes cutting load across several leading threads for smooth entry into through-holes and moderately deep blind holes. At 2.125 inches overall length with a 0.75-inch thread length, this tap fits standard tapping chucks and hand tap handles used in production and maintenance work. The H7 thread limit designation indicates it is oversize-ground, making it suitable for use with thread-locking compounds or for tapping materials that spring back slightly after cutting.

This tap is intended for general-purpose tapping applications in machine shops, maintenance facilities, and production environments. Its straight flute geometry works best in through-hole applications or shallow blind holes where chip evacuation is not a limiting concern. Material compatibility spans a broad range including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel, covering the majority of fastener hole applications encountered in mechanical assembly and repair work. It is sized for the common 8-32 thread used throughout light mechanical and electrical enclosure assembly.

Key Features

• 8-32 UNC right-hand thread form for one of the most common fastener sizes in light mechanical assemblies
• Plug chamfer with 3-5 lead threads distributes cutting forces and aids entry in through-hole and shallow blind-hole tapping
• High-speed steel construction provides good wear resistance across steel, cast iron, and aluminum workpieces
• Bright uncoated finish is compatible with a wide range of cutting fluids and tapping compounds
• H7 thread limit oversize grind accommodates thread-locking compounds and material springback
• Straight flute design simplifies regrinding and works well in low-torque hand tapping scenarios

Compatibility

Designed as a standard replacement or production tap for any application requiring 8-32 UNC internal threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, or high-carbon steel. OSG Series 102.

Installation Notes

This tap is installed by a machinist or maintenance technician using a standard tap handle, tapping head, or CNC tapping chuck with appropriate speed and feed settings for the workpiece material. Secure the workpiece fully before tapping and use a suitable cutting fluid or tapping compound to extend tool life and improve thread finish. For hand tapping, advance one full turn and back off a quarter turn periodically to break chips. Always ensure the tap is started square to the hole to avoid tap breakage and thread distortion.