Value Collection MSC-04460200 Straight Flute Tap 1/4-20 Unc

Product Description

The VALUE COLLECTION MSC-04460200 is a straight flute tap designed to cut 1/4-20 UNC 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 ferrous and non-ferrous metals, plastics, and composites. The plug chamfer on the lead end requires moderate starting torque, making it well suited for through-hole applications and general-purpose threading work. With 4 straight flutes and an H2 thread limit, the tap maintains close tolerance control for standard unified coarse thread requirements. Licensed machinists, tool-and-die makers, and maintenance technicians commonly use this size tap in production and repair environments.

This tap is intended for hand tapping or use in rigid tapping machines and CNC machining centers where coolant-through capability is not required. The 1/4-20 UNC designation makes it one of the most common tap sizes in North American manufacturing and maintenance applications, covering work on fastener holes in machine frames, fixtures, brackets, and structural components. The plug style suits through-hole threading operations where the tap can pass fully through the workpiece, clearing chips down through the hole.

Key Features

• 1/4-20 UNC thread form for standard unified coarse internal threads
• 4 straight flutes provide balanced cutting action and chip clearance in through-hole applications
• Plug chamfer with moderate lead-in for general-purpose through-hole tapping
• High-speed steel construction for durability across a broad range of workpiece materials
• Bright, uncoated finish suitable for use with cutting oils and standard tapping fluids
• H2 thread limit for close tolerance control on standard UNC fits
• Right-hand thread direction; compatible with standard tap wrenches and tapping heads

Compatibility

Designed as a standard replacement or production tap for any application requiring 1/4-20 UNC internal threads. Fits standard 1/4-20 tap wrenches, T-handle tap holders, and machine tapping chucks accepting straight-shank taps of this size.

Installation Notes

Secure the workpiece and drill the appropriate tap drill size before starting. Apply cutting oil or tapping fluid to reduce friction and extend tap life, especially in steel and stainless alloys. Use a tap wrench or tapping head aligned perpendicular to the work surface to prevent thread misalignment or tap breakage. Back the tap off periodically to break and clear chips when tapping deep or blind holes.