Accupro T2634642B Spiral Flute Tap 5/8-11 3 Flutes 2B

Product Description

The ACCUPRO T2634642B is a spiral flute tap designed for cutting 5/8-11 unified coarse internal threads in a variety of materials. It features three right-hand flutes with a 33-degree helix angle that efficiently evacuate chips up and out of the hole, making it well suited for blind-hole applications. Built from 3 percent vanadium high-speed steel, the tap delivers strong wear resistance and edge retention. The bright, uncoated finish suits use with a wide range of cutting fluids. Thread length is 23 millimeters and overall length is 3.8125 inches. This tap is a standard production tool installed by machinists and tool-and-die tradespeople in job shops, maintenance departments, and manufacturing environments.

The T2634642B is used wherever a 5/8-11 UNC through-thread or blind-hole thread must be cut with consistent 2B class-of-fit accuracy. The modified bottoming chamfer allows threading close to the bottom of a blind hole while still providing enough lead-in for reliable thread start. It is appropriate for manual tapping, CNC tapping, and rigid tapping operations where the 33-degree spiral flute geometry matches the feed and speed parameters of the machine setup. Typical materials include mild steel, alloy steel, aluminum, and similar machinable metals.

Key Features

• 5/8-11 UNC thread size with 2B class-of-fit tolerance for standard fastener compatibility
• Modified bottoming chamfer allows threading near the base of blind holes
• 33-degree right-hand spiral flute geometry promotes upward chip evacuation in blind-hole applications
• 3 percent vanadium high-speed steel construction for wear resistance and edge retention
• Bright, uncoated finish compatible with a broad range of cutting lubricants
• Right-hand thread direction; no coolant-through requirement simplifies setup

Compatibility

Designed as a standard 5/8-11 UNC spiral flute tap suitable for use in manual tap handles, tapping attachments, and CNC machining centers configured for rigid or floating-head tapping with the appropriate shank and holder for a 12.19 mm shank diameter.

Installation Notes

Tapping operations should be performed by qualified machinists following established speeds, feeds, and lubrication practices for the workpiece material. Always secure the workpiece and confirm proper alignment before starting the tap to prevent tap breakage or thread damage. When tapping blind holes, ensure the hole depth provides adequate clearance beyond the required thread length. Follow shop safety procedures and use appropriate cutting fluid to extend tap life and maintain thread quality.