Value Collection JY66556150 Straight Flute Tap 1-9/16-32 Uns

Product Description

The VALUE COLLECTION JY66556150 is a straight flute tap designed for threading 1-9/16-32 UNS internal threads in a bottoming chamfer configuration. Manufactured from high-speed steel (HSS) with a bright uncoated finish, it delivers reliable performance in ferrous and non-ferrous materials where thread quality and dimensional accuracy are critical. With 6 flutes and an H4 thread limit, this tap is suited for producing Class 3B close-tolerance threads in blind or through holes. Overall length is 5 inches with a 2-inch thread length, making it a solid choice for machinists and toolroom professionals handling precision threading operations.

This tap is intended for use in manual tapping, tapping arms, or rigid machine tapping setups where straight-flute geometry is appropriate — typically in softer materials or short-chipping metals. The bottoming chamfer (1-2 thread lead) allows threading close to the bottom of a blind hole, which is essential in precision fixturing, hydraulic manifolds, and mechanical assemblies requiring maximum thread engagement depth. It is well suited for production or maintenance machining environments where UNS thread forms are specified.

Key Features

• 1-9/16-32 UNS thread form with Class 3B fit for close-tolerance applications
• Bottoming chamfer allows threading to near the base of blind holes
• 6-flute design provides more cutting edges and improved thread finish stability
• High-speed steel construction offers good wear resistance across a range of workpiece materials
• H4 thread limit ensures consistent oversize control for proper fit with mating fasteners
• Bright uncoated finish — no coating buildup concerns in tight tolerance bores

Compatibility

Designed as an OEM-style replacement or direct toolroom tap for any application requiring a 1-9/16-32 UNS internal thread with a Class 3B fit and bottoming chamfer lead.

Installation Notes

This tap should be installed and operated by qualified machinists familiar with UNS thread standards and tapping practices. Always ensure the workpiece and tap are properly aligned before engagement to prevent tap breakage — misalignment is the leading cause of tap failure in large-diameter taps. Apply appropriate cutting fluid for the workpiece material and back off periodically to clear chips when tapping blind holes. Power down or disengage the spindle fully before changing taps or inspecting thread depth.