Value Collection MSC-04471249 5/16-24 Unf Straight Flute Tap

Product Description

The VALUE COLLECTION MSC-04471249 is a straight flute tap designed for cutting internal threads in through-holes and shallow blind holes where chip evacuation is straightforward. Sized at 5/16-24 UNF with a plug chamfer, it enters the hole with a gradual lead that distributes cutting load across the first few threads. Built from high-speed steel with a bright, uncoated finish, this tap suits general-purpose threading in steel, aluminum, and similar machinable materials. With 4 flutes and an H3 thread limit, it holds tight tolerances appropriate for a 3B class of fit. Overall length is 2-23/32 inches with a 1-inch thread length.

This tap is used in production and maintenance machining environments where UNF unified fine threads are required in standard through-hole applications. It is a practical choice for machine shops, maintenance technicians, and tool-and-die work. The plug chamfer style makes it well suited for starting in a pre-drilled hole and threading through the full depth with a tap wrench, tapping head, or CNC rigid tapping cycle.

Key Features

• 5/16-24 UNF thread form for unified fine-thread applications
• Plug chamfer provides a gradual 3-5 thread lead for controlled entry
• 4-flute design balances chip clearance and thread form support
• H3 thread limit maintains 3B class of fit tolerances
• High-speed steel construction handles a wide range of machinable metals
• Bright uncoated finish allows clear inspection of tool condition

Compatibility

Designed as a standard replacement or toolroom tap for applications requiring a 5/16-24 UNF, 3B class of fit, plug-style straight flute tap in high-speed steel.

Installation Notes

Installation is performed by machinists or maintenance technicians using a tap wrench, tapping stand, or machine tapping head. Always use the correct tap drill size for the 5/16-24 UNF thread form before tapping to ensure proper thread engagement and avoid tap breakage. Apply appropriate cutting fluid for the workpiece material and back the tap out periodically to break chips when working in blind holes. Inspect the tap for wear or chipping before each use to maintain thread quality and class of fit.