Reiff Nestor 45752 Spiral Point Extension Tap 5/8-11 Unc

Product Description

The REIFF NESTOR 45752 is a spiral point plug extension tap designed for cutting 5/8-11 UNC internal threads in through-hole applications. Built from high speed steel with a bright, uncoated finish, this tap is suited for threading operations where extended reach is required. The spiral point geometry pushes chips ahead of the cutting action, reducing clogging and improving performance in through-hole threading. With an H3 thread limit and a 3B class of fit, this tap produces threads within tight tolerance ranges commonly required in precision mechanical assemblies. It is a right-hand, plug-chamfer tool intended for use in production and maintenance machining environments.

This extension tap is used in applications where standard-length taps cannot reach the threading depth required by the workpiece geometry. Common scenarios include deep bosses, recessed holes, and fixture threading where clearance is limited. The plug chamfer makes it suitable as a starting tap in most through-hole threading jobs. It is typically installed in a tap wrench, tapping head, or machine spindle by machinists and maintenance technicians working with UNC fastener systems in metalworking, manufacturing, and industrial maintenance settings.

Key Features

• Spiral point geometry pushes chips forward, ideal for through-hole threading
• High speed steel construction provides durability in general-purpose threading
• H3 thread limit for controlled tolerance in 3B class of fit applications
• Plug chamfer allows use as a starting tap in most through-hole setups
• Reduced shank diameter of 0.48 inches extends reach into confined workpiece geometry
• Right-hand flute direction, 3 flutes, for standard UNC threading operations

Compatibility

Designed for use with 5/8-11 UNC thread series in right-hand through-hole applications requiring a 3B class of fit tolerance. Compatible with standard tap wrenches, tapping heads, and machine spindle holders accepting a 0.48-inch shank diameter.

Installation Notes

This tap should be installed by a qualified machinist or maintenance technician familiar with hand and machine tapping procedures. Ensure the workpiece is securely fixtured and the pilot hole is drilled to the correct tap drill size before threading. Use appropriate cutting fluid for the workpiece material to reduce heat and extend tool life. Do not force the tap if resistance increases unexpectedly, as breakage may result and recovery from a broken tap in a workpiece is difficult.