Osg 1754301 Spiral Flute Tap 6-32 Unc Modified Bottoming

Product Description

The OSG 1754301 is a spiral flute tap designed for cutting 6-32 UNC internal threads in a wide range of challenging materials. Built from powdered metal with a steam oxide coating, it handles alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloys where standard high-speed steel taps fall short. The modified bottoming chamfer allows threading close to the bottom of blind holes, making it well suited for tight-tolerance fastener applications. With a 15-degree helix angle and 2 right-hand flutes, it evacuates chips efficiently in short-chipping and stringy materials. Overall length is 2 inches, and it carries a 3B class of fit for standard commercial thread tolerance. Installed by machinists and tool-and-die professionals in both production and maintenance environments.

This tap fits production machining, CNC tapping, and manual tapping operations where a fine 6-32 UNC thread is required in tough or abrasion-resistant base materials. The modified bottoming chamfer makes it particularly useful in blind-hole applications where full thread depth close to the hole bottom is needed. The steam oxide finish reduces friction and provides a degree of lubricity that extends tool life when cutting stainless steel, titanium, and high-nickel alloys. It is sold individually and intended for use with appropriate tapping lubricant or cutting fluid matched to the workpiece material.

Key Features

• 6-32 UNC thread form with 32 threads per inch and 3B class of fit for standard commercial tolerance
• Modified bottoming chamfer for threading close to the bottom of blind holes
• Powdered metal construction provides hardness and wear resistance in difficult-to-machine alloys
• Steam oxide coating reduces friction and extends tool life in stainless steel, titanium, and high-nickel alloys
• 15-degree right-hand spiral flute promotes upward chip evacuation in short and stringy chip materials
• Right-hand thread direction; H2 thread limit for consistent fit across production runs

Compatibility

Rated for use in alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloy workpieces. Designed as a direct-use tap for 6-32 UNC blind and through-hole tapping operations in machining and assembly applications.

Installation Notes

Installation should be performed by a qualified machinist or tool technician using a properly sized tap wrench, tapping head, or CNC rigid tapping cycle. Always use a cutting fluid or tapping compound appropriate for the workpiece material, particularly when cutting stainless steel or titanium. Ensure the tap is aligned perpendicular to the workpiece surface before engaging threads to prevent tap breakage. Do not back-drive a tap under power without confirming the machine supports synchronized retraction.