Value Collection JY4841805 Straight Flute Tap 5/16-80 Uns

Product Description

The VALUE COLLECTION JY4841805 is a straight flute tap designed for cutting internal threads to the 5/16-80 UNS specification. Built from high-speed steel with a bright/uncoated finish, this plug chamfer tap is suited for general threading operations in ferrous and non-ferrous materials. It features 4 straight flutes and conforms to a 3B class of fit with an H3 thread limit, making it appropriate for standard tolerance threading work in machining and fabrication environments. The overall length is 2-23/32 inches. This tool is installed and used by machinists, tool-and-die technicians, and maintenance professionals working with threaded hole production.

This tap is used for producing right-hand internal threads in through-holes and blind holes where chip evacuation can be managed manually or with cutting fluid. The plug chamfer style provides a gradual thread lead-in, making it well suited for both through-hole and moderately deep blind-hole applications. It is a standard choice in job shops, maintenance facilities, and production environments requiring UNS thread forms at the 5/16-80 pitch.

Key Features

• Thread specification: 5/16-80 UNS right-hand thread
• 4 straight flutes for consistent chip formation in through-hole and blind-hole work
• Plug chamfer for gradual thread engagement and lead-in
• 3B class of fit with H3 thread limit for standard tolerance internal threads
• High-speed steel construction for durability across a range of workpiece materials
• Bright/uncoated finish — no added coating thickness to affect tolerance

Compatibility

Designed as a standard replacement or production tap for applications requiring 5/16-80 UNS internal threads with a 3B class of fit. Suitable for use in standard tap handles, T-handle wrenches, and machine tapping chucks accepting the appropriate shank diameter.

Installation Notes

This tap is installed by machinists and maintenance technicians using a tap wrench, T-handle, or machine tapping chuck. Ensure the correct drill size for a 5/16-80 UNS thread is used before tapping to avoid tap breakage. Apply appropriate cutting fluid for the workpiece material and advance the tap with periodic reversal to break chips when working in blind holes. Inspect flutes for wear or chip packing before each use.