Value Collection MSC-04424412 Straight Flute Tap 4-40

Product Description

The VALUE COLLECTION MSC-04424412 is a straight flute hand tap designed for cutting 4-40 UNC internal threads in through-holes and blind holes. Built from high-speed steel (HSS) with a bright, uncoated finish, it delivers solid performance in general-purpose threading applications. The bottoming chamfer style allows threads to be cut nearly to the bottom of a blind hole, making it a go-to choice when thread depth is critical. With 3 flutes and an H2 thread limit, this tap produces clean, accurate threads within a 2B or 3B class of fit. It has an overall length of 1.875 inches and a thread length of 0.5625 inches.

This tap is used by machinists, tool and die makers, and maintenance technicians working on small-fastener applications across aerospace, electronics, automotive, and general manufacturing. It suits hand tapping operations where a bottoming chamfer is required to maximize usable thread depth in shallow or closed-end holes. The 4-40 UNC thread size is common in instrument assemblies, electronics enclosures, and precision fixtures where small-diameter fasteners are standard.

Key Features

• Bottoming chamfer cuts threads close to the bottom of blind holes
• High-speed steel construction for durability across a range of work materials
• 3-flute design balances chip clearance and thread-forming strength
• H2 thread limit for consistent 2B and 3B class of fit compliance
• Right-hand thread direction for standard fastener compatibility
• Bright, uncoated finish suited for general-purpose use without added coating cost

Compatibility

Designed as an OEM-style replacement or standard hand tap for applications requiring 4-40 UNC internal threads with a bottoming chamfer profile.

Installation Notes

This tap is installed by machinists and maintenance technicians using a tap wrench or tapping handle. Always drill the correct tap drill diameter before tapping and ensure the workpiece is securely clamped. Apply cutting fluid appropriate for the work material to reduce heat and extend tap life. Back out the tap periodically to break chips and prevent binding, especially in blind holes.