Osg 1703408 Spiral Flute Tap 10-32 Unf Modified Bottoming

Product Description

The OSG 1703408 is a spiral flute tap designed for cutting 10-32 UNF right-hand internal threads in blind and through holes. It features a modified bottoming chamfer, which provides a longer lead than a standard bottoming tap while still threading close to the bottom of a blind hole. Manufactured from powdered metal and finished with a TICN (Titanium Carbon Nitride) coating, this tap offers elevated hardness and lubricity for demanding machining operations. The H6 thread limit designation indicates an oversize tolerance suited for use with coatings and in applications requiring precise thread fit. Overall length is 2.5 inches with a shank diameter of 0.255 inches.

This tap is rated for use in alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloys, making it appropriate for aerospace, defense, medical device, and precision manufacturing environments. The 15-degree right-hand helix angle evacuates chips efficiently in blind holes, reducing the risk of chip packing and tap breakage. It is suited for CNC machining centers and manual tapping operations where consistent thread quality in tough materials is required. The OSG EXOTAP Series 313 platform is engineered specifically for high-performance tapping in difficult-to-machine workpiece materials.

Key Features

• 10-32 UNF thread form with right-hand direction and H6 thread limit for controlled oversize tolerance
• Modified bottoming chamfer allows threading closer to the bottom of blind holes compared to plug chamfer
• TICN coating improves surface hardness and reduces friction when cutting stainless steel, titanium, and high-nickel alloys
• Powdered metal construction provides uniform carbide distribution for extended tool life in abrasive materials
• 15-degree right-hand spiral flute promotes upward chip evacuation in blind-hole applications
• No coolant-through design; compatible with flood coolant or cutting oil applied externally

Compatibility

Designed for tapping 10-32 UNF threads in alloy steel, stainless steel, hardened steel, titanium, and high-nickel alloy workpieces. Part of the OSG EXOTAP Series 313 product platform.

Installation Notes

Installation should be performed by a qualified machinist or CNC setup technician. Ensure the workpiece is securely fixtured and the spindle is properly aligned before engaging the tap to prevent thread distortion or breakage. Use a cutting fluid or tapping compound appropriate for the workpiece material, particularly when tapping stainless steel or titanium. Power off or disable the machine spindle before changing or inspecting taps.