Value Collection JY4874145 Straight Flute Tap 1-1/2-16 Uns

Product Description

The VALUE COLLECTION JY4874145 is a straight flute tap designed for cutting 1-1/2-16 UNS internal threads in a wide range of materials. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap delivers consistent thread quality in both production and maintenance applications. The plug chamfer style provides a standard lead that works well for through-holes and blind holes with adequate clearance. At 4 inches overall length and featuring 6 flutes, the tool offers chip clearance suited to moderate-depth tapping operations. Machinists and tool-and-die professionals specify this tap for its straightforward, reliable performance in right-hand thread cutting.

This tap is suited for threading operations where a 1-1/2-16 UNS thread form is required. The UNS (Unified National Special) thread standard is used in specialized mechanical and industrial assemblies where standard UNC or UNF pitches are not specified. The 3B class of fit designates an internal thread tolerance class appropriate for general-purpose bolted assemblies requiring reliable engagement without excessive play. Typical install scenarios include manual tapping with a tap wrench or power tapping on a drill press or CNC machine in job shop, maintenance, and manufacturing environments.

Key Features

• 1-1/2-16 UNS thread size with right-hand thread direction
• 6-flute design promotes chip clearance and smooth cutting action
• Plug chamfer provides a standard lead suitable for through-holes and accessible blind holes
• High-speed steel construction offers toughness across a broad range of workpiece materials
• Bright, uncoated finish for general-purpose use without additional surface treatment
• H4 thread limit for consistent tolerance control on 3B fit internal threads

Compatibility

Designed as a general-purpose straight flute tap for cutting 1-1/2-16 UNS right-hand internal threads in ferrous and non-ferrous materials. Verify workpiece material hardness and thread depth requirements before selection.

Installation Notes

Tapping operations should be performed by a qualified machinist following standard shop safety practices. Always secure the workpiece and ensure the tap is aligned perpendicular to the drilled hole before beginning thread cutting. Use appropriate cutting fluid for the workpiece material to extend tool life and improve thread finish. Inspect the tap for wear or damage before each use and never force a tap that has become jammed, as breakage may result.