Value Collection JY4845202 Hand Tap 9/16-20 Uns Bottoming

Product Description

The VALUE COLLECTION JY4845202 is a 9/16-20 bottoming hand tap designed for cutting internal threads to the bottom of blind holes. Made from high speed steel with a bright uncoated finish, this tap delivers consistent thread formation in ferrous and non-ferrous metals. It carries a Class 3B fit designation and an H3 thread limit, producing tight-tolerance threads suited to precision fastener applications. The 4-flute straight flute geometry provides stable chip evacuation in through-hole and short blind-hole work. With an overall length of 3-19/32 inches, it fits standard tap wrenches used by machinists and maintenance technicians.

This tap is intended for hand tapping operations where a bottoming chamfer is required to thread as close to the bottom of a blind hole as possible. It follows the UNS thread standard at 9/16-20, making it appropriate for applications that call for fine-pitch unified thread forms in that size range. Typical use cases include repair threading, fixture fabrication, and production hand-tapping in machine shops, maintenance facilities, and industrial service environments.

Key Features

• Bottoming chamfer allows threading to the base of blind holes
• High speed steel construction resists heat and wear during hand tapping
• Bright uncoated finish suitable for use with standard cutting oils and lubricants
• Class 3B fit with H3 thread limit for tight-tolerance thread production
• 4-flute straight flute design provides rigidity and chip control
• Overall length of 3-19/32 inches compatible with standard tap wrenches

Compatibility

Designed as an OEM-style hand tap for 9/16-20 UNS right-hand threaded applications requiring a bottoming chamfer and Class 3B fit.

Installation Notes

This tap is installed by machinists or maintenance technicians using a standard tap wrench. Always apply appropriate cutting fluid before and during tapping to reduce friction and extend tool life. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the hole before applying torque. A starter or plug tap should be used first when threading from scratch in a blind hole before finishing with this bottoming tap.