Osg 1065102 Straight Flute Plug Tap 2-56 Unc

Product Description

The OSG 1065102 is a straight flute plug tap designed for cutting right-hand internal threads in standard machining and maintenance applications. Built from high-speed steel, it produces 2-56 UNC threads to a 2B class of fit with an H2 thread limit, ensuring consistent thread form and dimensional accuracy. The plug chamfer provides a gradual lead-in that works well in through-hole tapping. With a thread length of 7/16 inches and an overall length of 1-3/4 inches, this tap fits standard tap wrenches, T-handle drivers, and machine tool holders used in precision threading work.

This tap is suited for thread-cutting operations in ferrous and non-ferrous materials across light manufacturing, repair shops, and tool room environments. Its 2-56 UNC configuration is common in small fastener applications including instrument assembly, electronics enclosures, and precision mechanical components. The two-flute straight design provides chip clearance in both through-hole and short blind-hole situations, though it is most effective in through-hole applications where chips can exit freely.

Key Features

• 2-56 UNC thread form with 2B class of fit for standard fastener compatibility
• H2 thread limit for controlled tolerance threading
• Plug chamfer with gradual lead-in suitable for through-hole tapping
• High-speed steel construction provides wear resistance across a range of workpiece materials
• Two-flute straight design promotes chip clearance during operation
• Compact 1-3/4 inch overall length fits standard small tap holders and machine setups

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 stock tap for 2-56 UNC through-hole tapping operations in general machining environments.

Installation Notes

Threading operations with this tap should be performed by a machinist or qualified trade professional familiar with tap drill sizing and thread cutting procedures. Ensure the correct tap drill diameter is used for 2-56 UNC before starting. Apply appropriate cutting fluid for the workpiece material to extend tool life and improve thread quality. Do not force the tap if resistance increases abnormally, as breakage in small-diameter taps is difficult to reverse.