Osg 1400116200 Thread Forming Tap 8-36 Unf Cobalt

Product Description

The OSG 1400116200 is a thread forming tap in the HY-PRO NRT series, designed for 8-36 UNF right-hand internal threads without cutting a chip. Thread forming displaces material rather than removing it, producing stronger threads with a better surface finish than cut taps. This tap features a modified bottoming chamfer of 2 to 2.5 threads, allowing threading close to the bottom of blind holes. Built from cobalt high-speed steel with a bright finish, it carries a H4 thread limit and measures 2.125 inches overall length with a 0.168-inch shank diameter. It is used by machinists and maintenance technicians working with precision fastener applications.

The 1400116200 is suited for blind hole threading in a range of metallic workpiece materials. The cobalt construction supports use in alloy steel, carbon steel, die steel, hardened steel, stainless steel, and aluminum. The modified bottoming chamfer makes it practical where thread engagement must start close to the hole bottom, common in fixture plates, housings, and structural components machined to tight depth tolerances. The 0.752-inch tapping depth accommodates standard shallow-blind-hole applications in these material families.

Key Features

• Thread forming design eliminates chips, reducing tap breakage risk in blind holes
• Cobalt high-speed steel construction for durability in hardened and stainless steel
• Modified bottoming chamfer (2 to 2.5 threads) for threading near hole bottoms
• H4 thread limit for close-tolerance UNF thread production
• Bright finish, no coolant-through requirement — compatible with flood or paste lubricant
• Right-hand thread direction, 36 threads per inch per UNF standard

Compatibility

Designed for blind hole threading in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Material application codes P and N apply per OSG classification.

Installation Notes

Thread forming taps require a properly sized forming tap drill — use the correct drill diameter for the material and desired thread engagement, as standard cut-tap drill charts do not apply. Power down or disengage the spindle before loading or removing the tap from the holder. Apply an appropriate cutting fluid or tapping compound for the workpiece material, particularly when working with stainless or hardened steel. Follow shop-standard torque and speed parameters for the tap diameter and material; exceeding recommended feed rates in hard materials risks tap failure.