Osg 1011000 Straight Flute Tap 2-56 Unc Hss Plug

Product Description

The OSG 1011000 is a straight flute plug tap designed for cutting 2-56 UNC internal threads in a wide range of metals. Manufactured from high-speed steel (HSS) with a bright, uncoated finish, it produces right-hand threads to a 2B class of fit with an H2 thread limit. The plug chamfer - typically 3 to 5 threads - makes it suitable for through-holes and semi-blind applications. With 3 flutes and a 7/16-inch thread length on a 1-3/4-inch overall length, this tap is sized for precision small-diameter threading work performed by machinists, tool-and-die technicians, and maintenance tradespeople.

This tap is used in production and maintenance applications where 2-56 UNC threads are required. The straight flute geometry performs well in short-chipping materials. Typical install scenarios include threading pilot holes in machine components, enclosures, and small mechanical assemblies. The bright finish is standard for general-purpose threading without specialized lubrication demands.

Key Features

• 2-56 UNC thread form with right-hand direction and 2B class of fit
• H2 thread limit for consistent tolerance in production threading
• Plug chamfer suits through-hole and semi-blind threading applications
• High-speed steel construction provides durability across a range of workpiece metals
• 3 straight flutes for efficient chip clearance in short-chipping materials
• Bright, uncoated finish compatible with standard cutting fluids and tapping compounds

Compatibility

Rated for use in aluminum, cast aluminum, cast iron, high-carbon steel, low-carbon steel, and medium-carbon steel workpieces. Designed as a standard replacement or production tap for any application requiring 2-56 UNC internal threads to a 2B fit standard.

Installation Notes

Install in a tap wrench, tapping head, or CNC tapping chuck appropriate for the shank diameter. Ensure the pilot hole is drilled to the correct tap drill size for a 2-56 UNC thread before starting. Apply a suitable cutting fluid or tapping compound for the workpiece material to extend tool life and improve thread quality. Handle small-diameter taps with care to avoid breakage from side loading or misalignment during starting.