Osg 1700201 Spiral Point Tap 1/4-20 Unc Plug 3 Flute

Product Description

The OSG 1700201 is a spiral point tap designed for threading 1/4-20 UNC holes in demanding metalworking applications. It features a plug chamfer profile with 3 flutes and is manufactured from powdered metal with a steam oxide coating. The H5 thread limit and 2B class of fit make it suited for standard production threading where dimensional control is critical. With an overall length of 2.5 inches and a thread length of 0.62 inches, this right-hand tap is a compact tool appropriate for CNC machining centers, drill presses, and hand tapping setups. Machinists, tool and die makers, and maintenance technicians are the primary users.

The 1700201 is intended for through-hole threading in tough materials. It is rated for use in hardened steel, stainless steel, high-nickel alloy, titanium, alloy steel, and die steel. The spiral point geometry pushes chips ahead of the cutting action, making it most effective in through-hole applications where chip evacuation is essential. It is a strong fit for production environments where these difficult alloys are common. Coolant-through is not supported on this tap.

Key Features

• Thread size 1/4-20 UNC with right-hand thread direction
• Plug chamfer for gradual thread engagement on through-hole work
• 3-flute spiral point geometry pushes chips forward for clean chip evacuation
• Powdered metal construction improves wear resistance in hard and abrasive materials
• Steam oxide coating reduces friction and provides light lubricity during cutting
• H5 thread limit and 2B class of fit for standard tolerance threading

Compatibility

Rated for threading hardened steel, stainless steel, high-nickel alloy, titanium, alloy steel, and die steel. Designed for through-hole tapping applications where chip evacuation forward of the cutting zone is required.

Installation Notes

This tap is installed by a machinist or maintenance technician using a tap wrench, tapping head, or CNC rigid tapping cycle. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size for 1/4-20 UNC before threading. Apply appropriate cutting fluid for the workpiece material to extend tool life and maintain thread quality. Do not reverse the tap without breaking the chip, as chip packing can cause tap breakage in tough alloys.