1 3/16ft - 16 Straight Flute Machine Tap UNF - Clean Thread Cutting

In this review the 1 3/16' - 16 Straight Flute Machine Tap is assessed for machinists and hobbyists who need a single, reliable UNF tap for repair or fabrication work. The bottom line: this is a straightforward, well-made high speed steel tap that cuts clean 16 TPI UNF threads and suits applications where a tolerant 2B thread class and right hand threading are required. It is especially useful when a machinist needs a spare or replacement tap in nominal diameter 1 3/16' without shopping for a full set.

Key Features

• Material: High speed steel construction offers durability and consistent cutting performance when tapping common steels and softer alloys.
• Thread form: 16 TPI UNF straight flute design produces accurate fine threads suited for assembly where tighter clearance is needed.
• Tolerance: 2B tolerance grade delivers a standard internal thread fit for general-purpose mating with external UNF bolts.
• Direction: Right hand thread orientation matches the vast majority of fasteners and simplifies replacement work without modifying setup.
• Single piece packaging: Sold as one 1 3/16' - 16 machine tap, making it convenient to keep a spare on the bench for occasional repairs.

Who It's For

This tap is best for machinists, maintenance technicians, and experienced hobbyists who occasionally need a specific 1 3/16' - 16 UNF replacement tap for fixtures, repairs, or custom builds. It is ideal when the work calls for a 2B internal thread and a straight flute geometry for use in through holes or with manual control.

Those who should look elsewhere include users who require a full tap set, specialized coatings for extreme wear resistance, or taps intended primarily for blind hole production with chip evacuation features. For high-volume production or exotic alloys, a coated or spiral-flute tap may be a better choice.

Pros & Cons

Pros

• Good build quality in HSS yields reliable cutting and a solid feel when tapping.
• Straight flute UNF 16 TPI provides clean, accurate thread engagement for fine-thread applications.
• Clear specification of nominal diameter and 2B tolerance makes it simple to match with mating fasteners.

Cons

• Sold as a single tap, so sourcing multiple sizes requires separate purchases rather than a set.

Specifications

Model	1 3/16' - 16 Machine Tap
Nominal diameter	1 3/16'
Thread per inch	16 TPI UNF
Direction	Right hand
Tolerance grade	2B
Material	High speed steel (HSS)
Package contents	1 pcs 1 3/16' - 16 tap

Our Verdict

The 1 3/16' - 16 straight flute machine tap is a practical, no-frills choice for anyone who needs a single, reliable UNF tap in nominal diameter 1 3/16'. It offers good value for repair and low-volume production work thanks to HSS construction and a standard 2B tolerance, making it a sensible bench spare for mechanics and fabricators.

Frequently Asked Questions

Is this tap suitable for through holes?
Yes, the straight flute geometry is appropriate for through hole tapping and general-purpose use.

What thread fit does 2B indicate?
2B is a standard internal thread tolerance that provides a common fit for mating with external UNF bolts.

Does the package include multiple taps?
No, the product is sold as a single 1 3/16' - 16 tap in the package.