Osg 1001600 Straight Flute Tap 3-48 Unc Plug Hss

Product Description

The OSG 1001600 is a straight flute tap designed for threading 3-48 UNC holes in a wide range of ferrous and non-ferrous materials. It features a plug chamfer, 3 flutes, and a 3B class of fit with an H1 thread limit, making it well suited for through-hole and shallow blind-hole tapping applications. Constructed from high-speed steel with a bright, uncoated finish, this tap delivers reliable cutting performance in production and maintenance environments. The overall length is 1-13/16 inches, with a thread length of 1/2 inch. Installation and use are handled by machinists, toolroom technicians, and maintenance mechanics working with small-diameter threaded fastener applications.

This tap is intended for use in tapping 3-48 UNC threads in materials including aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The plug chamfer provides a gradual lead-in suited for through holes or holes with sufficient depth for full thread engagement. It is a standard-type tap in the OSG 102 series and is appropriate for both manual and machine tapping operations where right-hand threads are required.

Key Features

• 3-48 UNC thread form with right-hand direction and 3B class of fit
• Plug chamfer for gradual thread lead-in in through holes or adequately deep blind holes
• 3-flute geometry supports chip clearance in the listed material applications
• High-speed steel construction provides toughness across ferrous and non-ferrous workpieces
• H1 thread limit for close-tolerance thread production
• Bright, uncoated finish - no coating buildup affecting minor diameter control

Compatibility

Designed for tapping 3-48 UNC threads in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. Part of the OSG 102 series of standard straight flute taps.

Installation Notes

This tap is installed and operated by machinists or maintenance technicians using a tap wrench, tapping head, or CNC machine tool. Before tapping, verify the correct tap drill diameter for the 3-48 UNC thread form and ensure the workpiece is securely fixtured. Use an appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Inspect the tap for wear or chipping before each use, as small-diameter taps are susceptible to breakage under misalignment or excessive force.