Osg 1625002562 Thread Forming Tap 2-56 Unc Cobalt Ticn

Product Description

The OSG 1625002562 is a thread forming tap in the EXOPRO XPF Series 16250, designed for cold-form threading in a wide range of metallic workpiece materials. Unlike cutting taps, thread forming taps displace material rather than remove chips, producing stronger threads with superior surface finish. This tap is configured for 2-56 UNC threads at a 3B class of fit with an H2 thread limit, and features a modified bottoming chamfer of 2.5 to 3 threads for threading close to the bottom of blind holes. It is manufactured from cobalt high-speed steel and finished with a TiCN coating, both of which extend tool life in demanding applications. Machinists and tooling specialists in job shops, aerospace, and precision manufacturing environments are the primary users.

This tap is suited for blind hole and through-hole threading operations across a broad spectrum of materials including aluminum, cast aluminum, carbon steel, alloy steel, die steel, hardened steel, stainless steel, high-nickel alloys, and titanium. The modified bottoming chamfer makes it especially practical when thread depth is critical and full engagement near the hole bottom is required. It is applicable in production machining, maintenance and repair operations, and prototype fabrication wherever 2-56 UNC internal threads are specified.

Key Features

• Thread forming design cold-works threads for higher strength and no chip evacuation concerns
• Cobalt HSS construction provides heat and wear resistance in tough alloys and stainless steel
• TiCN coating reduces friction and extends tool life across ferrous and non-ferrous materials
• Modified bottoming chamfer (2.5 to 3 threads) allows threading close to blind hole bottoms
• H2 thread limit and 3B class of fit deliver consistent, close-tolerance thread geometry
• Right-hand thread direction; compatible with blind hole and through-hole applications

Compatibility

Designed for 2-56 UNC internal thread forming in aluminum, cast aluminum, carbon steel, alloy steel, die steel, hardened steel, stainless steel, high-nickel alloys, and titanium workpieces; material application codes P, M, N, and H.

Installation Notes

Thread forming taps require a properly sized forming tap drill hole, which is larger than the drill size used for cutting taps — consult the applicable forming tap drill chart for 2-56 UNC before drilling. Apply appropriate tapping fluid or cutting oil for the workpiece material; lubrication is critical when forming threads in stainless steel, high-nickel alloys, and titanium. Ensure the tap is driven with a synchronized tapping head or CNC rigid tapping cycle to maintain pitch accuracy and prevent tap breakage. Power down and secure the workpiece in the machine before tool changes.