Osg 2812800 Spiral Point Tap 8-32 Unc 3 Flute 2B Hss

Product Description

The OSG 2812800 is a spiral point tap designed for right-hand threading in a wide range of ferrous and non-ferrous materials. Built from vanadium high-speed steel (HSS-E), it delivers improved wear resistance and toughness compared to standard HSS. The plug chamfer style distributes cutting load across the lead threads, making it suitable for through-hole tapping. With a 2B class of fit and H3 thread limit, this tap produces threads that meet standard tolerance requirements for most fastener and mechanical assembly applications. The bright finish indicates no coating, which is typical for tapping operations where cutting fluid provides the necessary lubrication.

The 2812800 is used in through-hole tapping of 8-32 UNC threads across a broad range of materials including aluminum, low-carbon steel, medium-carbon steel, high-carbon steel, alloy steel, die steel, stainless steel, and cast iron. It is suited for production and maintenance applications in machine shops, manufacturing facilities, and field repair environments. Machinists and maintenance technicians typically use this tap in hand tapping or CNC tapping setups where a plug-style lead is preferred for through-hole work.

Key Features

• 8-32 UNC thread form with H3 thread limit for 2B class of fit
• Vanadium high-speed steel (HSS-E) construction for improved wear resistance and toughness
• 3-flute spiral point design pushes chips forward, reducing clogging in through-hole applications
• Plug chamfer distributes cutting load across lead threads for smoother entry
• Bright finish with no coolant-through — use external cutting fluid for lubrication
• Right-hand thread direction; no interrupted thread; not oversize

Compatibility

Designed for through-hole tapping of 8-32 UNC threads in aluminum, hardened steel, stainless steel, high-carbon steel, low-carbon steel, medium-carbon steel, alloy steel, die steel, and cast iron.

Installation Notes

This tap is installed by machinists and maintenance technicians using a tap handle, tap wrench, or CNC tapping spindle. Before tapping, verify the pilot hole diameter matches the 8-32 UNC tap drill specification and that the workpiece is securely fixtured. Apply appropriate cutting fluid for the material being tapped to prevent galling and extend tap life. Avoid applying side pressure during tapping, and back the tap out periodically in hand tapping to break and clear chips.