Osg 1635002045 Thread Forming Tap M2x0.40 Cobalt Ticn

Product Description

The OSG 1635002045 is a thread forming tap designed for M2x0.40 Metric Coarse threads with a 6H class of fit. Made from cobalt high-speed steel and finished with a TiCN (Titanium Carbonitride) coating, this tap cold-forms internal threads without cutting, producing stronger thread walls through material displacement. The modified bottoming chamfer with 2.5 to 3 chamfered threads allows threading close to the bottom of blind holes. Overall length is 1.77 inches (45 mm), with a thread length of 0.44 inches (8 mm) and a tapping depth of 0.35 inches (9 mm). Part of the OSG EXOPRO XPF Series 16350, this tool is suited for precision threading in small-diameter applications handled by machinists and tool-and-die professionals.

This tap is engineered for both blind hole and through-hole threading operations across a wide range of materials. It performs in aluminum, cast aluminum, carbon steel, alloy steel, die steel, stainless steel, high-nickel alloy, and titanium. The TiCN coating reduces friction and improves wear resistance, making it a practical choice for production environments where tool life and thread quality matter. Right-hand thread direction is standard. This tap is applicable wherever M2x0.40 internal threads with a 6H tolerance class are required in tight or deep-cavity workpieces.

Key Features

• Thread forming (chipless) design strengthens thread walls through cold-working rather than cutting
• Cobalt substrate provides heat resistance and toughness for difficult materials including stainless steel and titanium
• TiCN coating reduces friction and extends tool life in high-volume threading applications
• Modified bottoming chamfer (2.5 to 3P) allows threading close to the bottom of blind holes
• 6H class of fit and D5 thread limit ensure dimensional accuracy for standard metric fastener engagement
• Compatible with both blind hole and through-hole threading setups

Compatibility

Designed for M2x0.40 Metric Coarse thread forming in aluminum, cast aluminum, carbon steel, alloy steel, die steel, stainless steel, high-nickel alloy, and titanium workpieces. Suitable for blind hole and through-hole threading applications requiring a 6H class of fit.

Installation Notes

Thread forming taps require a specific tap drill size to produce the correct pre-form hole diameter before tapping — consult a thread forming tap drill chart for M2x0.40 to determine the correct drill size, as it differs from a cutting tap drill. Use a tapping fluid or cutting oil appropriate for the workpiece material, particularly with stainless steel, high-nickel alloy, and titanium. Secure the workpiece fully before tapping and ensure the tap is properly aligned to avoid galling or tap breakage in small-diameter applications. Power down or disengage all machine motion before changing or inspecting the tap.