Osg 1205200 Spiral Point Tap 1-64 Unc 2 Flute Hss

Product Description

The OSG 1205200 is a spiral point tap designed for cutting 1-64 UNC internal threads in a wide range of materials. Built from high-speed steel with a bright finish, it features a plug chamfer and 2 flutes with a right-hand thread direction. The H2 thread limit and Class 2B fit make it suitable for standard tolerance threading applications encountered in precision machining, maintenance, and fabrication environments. With an overall length of 1.688 inches and a thread length of 0.37 inches, this tap is well-suited for shallow-to-moderate depth tapping of small-diameter holes. It is installed by machinists, toolmakers, and mechanical technicians.

This tap is intended for use in both manual and machine tapping operations on #1-64 UNC threaded holes. It performs across a broad material range including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, high-carbon steel, and hardened steel. The spiral point design pushes chips ahead of the cutting edges, making it especially effective in through-hole applications where chip evacuation is critical. It fits standard tap holders and drive handles sized for a 0.141-inch shank diameter.

Key Features

• 1-64 UNC thread size with right-hand thread direction and Class 2B fit
• H2 thread limit for standard tolerance control in production and repair work
• Plug chamfer eases tap entry and distributes cutting load across leading threads
• Spiral point geometry pushes chips forward, reducing packing in through-hole tapping
• High-speed steel construction provides wear resistance across ferrous and non-ferrous materials
• Bright finish with no coolant-through requirement simplifies setup in dry or flood-cooled operations

Compatibility

Designed as an OEM-style threading tool for 1-64 UNC through-hole tapping applications across the stated material range; fits standard tap holders and drive tools accepting a 0.141-inch shank.

Installation Notes

This tap should be installed by a qualified machinist or toolmaker using a properly sized tap wrench or machine tap holder. Secure the workpiece before operation and use cutting fluid appropriate for the work material to extend tool life and improve thread quality. Inspect the tap for wear or chipping before each use, and never force a tap that has stalled, as high-speed steel taps are brittle and susceptible to breakage under torsional overload.