Accupro T1620402B Spiral Point Tap 1/4-20 Plug 2B

Product Description

The ACCUPRO T1620402B is a spiral point tap designed for cutting right-hand internal threads in through-hole applications. It threads 1/4-20 UNC at a 2B class of fit using three flutes and a plug chamfer to drive chips forward ahead of the tap. The body is ground from 3% vanadium high-speed steel and finished with an oxide coating that provides mild lubricity and corrosion resistance. Overall length is 2.5 inches with a thread length of 19 millimeters. This tap is suited for machinists, maintenance technicians, and fabricators working in job shops, manufacturing facilities, and field repair environments.

The T1620402B is rated for use in stainless steel, making it appropriate for applications where conventional high-speed steel taps wear prematurely. The plug chamfer distributes cutting load across the first few threads, which helps reduce tap breakage on entry. Through-hole threading operations in ferrous and stainless workpieces are the primary application. This tap is a single-piece unit packaged individually and is sized for use in standard 1/4-20 tapping operations on manual machines, CNC tapping heads, and hand tap wrenches.

Key Features

• Spiral point design pushes chips forward, keeping flutes clear during through-hole tapping
• 3% vanadium high-speed steel construction for increased wear resistance in stainless steel applications
• Oxide coating provides corrosion resistance and mild lubricity
• Plug chamfer distributes cutting load across several leading threads for stable entry
• 2B class of fit produces standard commercial thread tolerances
• Right-hand thread direction compatible with standard tapping equipment

Compatibility

Designed as an OEM-style replacement or standard cutting tool for 1/4-20 right-hand through-hole tapping operations. Rated for stainless steel material applications per manufacturer specifications.

Installation Notes

Installation should be performed by a qualified machinist or maintenance technician familiar with tapping procedures. Secure the workpiece fully before beginning the tapping operation to prevent movement. Use an appropriate cutting fluid or tapping compound, particularly when working in stainless steel, to extend tool life and improve thread finish. Do not reverse the tap under power without confirming the machine or tapping head supports reversing to avoid tap breakage.