Osg 1410100601 Thread Forming Tap M2x0.40 Cobalt

Product Description

The OSG 1410100601 is a thread forming tap designed for cold-form internal threading in metalworking applications. Part of the HY-PRO NRT series, it produces M2x0.40 Metric Coarse threads using a chipless forming action, which displaces material rather than cutting it. This results in stronger threads and eliminates chip evacuation concerns in blind holes. The tap is manufactured from cobalt high-speed steel and finished with a steam oxide coating to reduce friction and improve lubricity during tapping. Overall length is 1.75 inches with a thread-forming depth of 0.476 inches. Licensed machinists and tool-and-die professionals working in precision metalworking environments are the primary users.

This tap is suited for blind hole threading operations across a broad range of materials. The modified bottoming chamfer with 2 to 2.5 chamfered threads allows tapping close to the bottom of a blind hole. It carries a 4H class of fit and D3 thread limit, targeting close-tolerance internal threads in production and job-shop environments. Material applications include alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel, covering both ferrous and non-ferrous workpieces common in precision machining, automotive, and aerospace component work.

Key Features

• Chipless cold-forming action eliminates chips in blind hole threading, reducing tap breakage risk
• Cobalt construction provides heat and wear resistance in tough ferrous and stainless steel applications
• Steam oxide coating reduces friction and improves tap life during high-torque forming operations
• Modified bottoming chamfer (2 to 2.5P) enables threading close to hole bottom
• 4H class of fit with D3 thread limit for consistent, close-tolerance metric thread production
• Right-hand thread direction, no coolant-through requirement

Compatibility

Designed for use in alloy steel, aluminum, carbon steel, die steel, hardened steel, and stainless steel workpieces. Suitable for blind hole threading applications requiring M2x0.40 Metric Coarse internal threads to a 4H class of fit.

Installation Notes

Thread forming taps require adequate lubrication or cutting fluid matched to the workpiece material - consult tooling data for appropriate lubricant selection. Ensure the pilot hole is drilled to the correct form-tap minor diameter before tapping, as this differs from a cut-tap drill size. Use a calibrated torque-controlled tapping tool or tapping head where possible to avoid overloading the small-diameter shank. Secure workpieces firmly and align the tap perpendicular to the hole axis before beginning the forming cycle.