Osg 1400102600 Thread Forming Tap 2-56 Unc Cobalt

Product Description

The OSG 1400102600 is a thread forming tap from the HY-PRO NRT series, designed to produce 2-56 UNC internal threads in blind holes without cutting. Thread forming displaces material rather than removing chips, resulting in stronger threads and eliminating the need for chip clearance. This tap is manufactured from cobalt high-speed steel with a bright finish and is built for use in demanding production and maintenance environments. At 1.75 inches overall length with a 0.437-inch thread length, it suits compact fastener applications. The H3 thread limit and 2B class of fit make it appropriate for standard precision thread assemblies. Licensed machinists, tool and die makers, and production technicians are the primary users.

This tap is suited for blind hole threading in a wide range of metallic workpiece materials including alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel. The modified bottoming chamfer with 2 to 2.5 chamfered threads allows the tap to start threads close to the bottom of a blind hole, maximizing usable thread depth. It is commonly used in small fastener and precision instrument applications where 2-56 UNC threads are specified and hole depth is limited.

Key Features

• Thread forming design displaces material for chip-free blind hole threading
• Cobalt high-speed steel construction for improved heat and wear resistance in tough alloys
• Modified bottoming chamfer threads close to the bottom of blind holes
• H3 thread limit with 2B class of fit for standard precision tolerance assemblies
• Right-hand thread direction, 56 threads per inch, 2-56 UNC specification
• No coolant-through requirement simplifies tooling setup

Compatibility

Designed for use in blind hole threading operations on alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces requiring 2-56 UNC internal threads.

Installation Notes

This tap is intended for use by qualified machinists and tooling professionals. Ensure the workpiece is securely fixtured and the spindle is properly aligned before tapping to prevent tap breakage at this small diameter. Use an appropriate tapping fluid or cutting oil matched to the workpiece material to extend tap life. Follow shop-specific procedures and applicable safety standards when operating tapping equipment.