Value Collection JY4877056 Hand Tap 1-3/4-10 Uns 6-flute Hss

Product Description

The VALUE COLLECTION JY4877056 is a straight-flute hand tap designed for cutting 1-3/4-10 UNS internal threads in a variety of materials. Manufactured from high speed steel with a bright, uncoated finish, this tap delivers reliable cutting performance in through-hole and open-field tapping applications. The plug chamfer (3-5 threads) makes it suitable for starting threads in through-holes where a full-length lead-in is practical. The H4 thread limit and Class 3B fit designation ensure the finished thread meets tight tolerance requirements. Overall length is 5 inches. Installation is performed by hand or with a tap wrench in a controlled manual tapping process.

This tap is suited for maintenance, toolroom, and production environments where large-diameter UNS threads are required. The 1-3/4-10 thread size and 6-flute configuration support controlled chip formation and smooth cutting torque in ferrous and non-ferrous metals. It is commonly used by machinists, millwrights, and maintenance mechanics working on heavy equipment, flanges, couplings, and structural assemblies that require UNS-standard internal threads.

Key Features

• 1-3/4-10 UNS thread size for large-diameter unified national special thread applications
• High speed steel construction provides durability across a range of workpiece materials
• Plug chamfer (3-5 thread lead) is suited for through-hole tapping
• 6-flute straight-flute design promotes chip control and even cutting load distribution
• Class 3B fit with H4 thread limit for tight-tolerance thread production
• Bright, uncoated finish — no additional coating to affect dimensional tolerance

Compatibility

Designed as an OEM-style hand tap for manual or machine-assisted tapping of 1-3/4-10 UNS internal threads in through-hole applications using a standard tap wrench or tapping fixture.

Installation Notes

A licensed machinist or qualified maintenance mechanic should install this tap using a properly sized tap wrench to maintain alignment and control torque. Secure the workpiece firmly before beginning; misalignment is the primary cause of tap breakage at this diameter. Apply an appropriate cutting fluid for the workpiece material to reduce heat and extend tap life. Do not force the tap — back off periodically to break chips when tapping deeper holes.