Value Collection JY9975707 Spiral Point Tap 4-40 Hss

Product Description

The VALUE COLLECTION JY9975707 is a spiral point plug tap designed for threading 4-40 UNC right-hand internal threads in through-hole applications. Built from high-speed steel (HSS) with a bright, uncoated finish, this extension tap measures 4 inches in overall length, giving technicians added reach in recessed or deep-access work. The spiral point geometry pushes chips forward ahead of the tap, reducing clogging and making it well suited for production threading and repair work where chip evacuation matters. It carries an H2 thread limit and a 2B/3B class of fit, meeting standard tolerance requirements for most 4-40 fastener applications.

This tap is used in metalworking, maintenance, and precision assembly environments where 4-40 UNC threads are common. The 4-inch overall length makes it particularly useful when tapping blind-flanged enclosures, deep bosses, or fixture plates that a standard-length tap cannot reach. It is appropriate for use in both manual tapping handles and machine tapping setups operating at appropriate feeds and speeds for HSS tooling. Suitable for use in ferrous and non-ferrous base materials where 4-40 thread repair or initial thread cutting is required.

Key Features

• Spiral point design pushes chips forward for efficient through-hole threading
• 4-inch overall length provides extended reach in deep or recessed workpieces
• High-speed steel construction offers good wear resistance across a range of base materials
• H2 thread limit with 2B/3B class of fit meets standard 4-40 UNC tolerance requirements
• Bright, uncoated finish — compatible with standard cutting fluids and lubricants
• Plug chamfer style for general-purpose through-hole tapping

Compatibility

Designed for cutting 4-40 UNC right-hand internal threads in through-hole configurations. Compatible with standard 4-40 tap handles, machine tap holders, and tapping heads that accept the appropriate shank diameter for this tool size.

Installation Notes

Installation should be performed by a machinist or qualified maintenance technician using appropriate cutting fluid to reduce tool wear and heat buildup. Ensure the workpiece is securely fixtured and the tap is aligned perpendicular to the work surface before advancing. For machine tapping, set spindle speed appropriate for HSS tooling in the target material. Do not force a bound or loaded tap — back off periodically to break and clear chips during the threading operation.