Value Collection JY9037524 Straight Flute Tap M39x3

Product Description

The VALUE COLLECTION JY9037524 is a straight flute tap designed to cut M39x3 metric fine internal threads in a wide range of materials. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap delivers reliable performance in production and maintenance threading applications. It features 4 straight flutes and a plug chamfer, making it well suited for threading through holes where chip evacuation is straightforward. The overall length is 6.0625 inches, with a thread length of 3 inches. Right-hand thread direction is standard, and the D6 thread limit designation ensures the tap holds appropriate tolerance for metric fine thread fits. Installation is performed by licensed machinists and toolroom technicians using standard tapping equipment or CNC machining centers.

This tap is used in metalworking operations requiring M39x3 metric fine threads. Typical applications include threading large-diameter holes in machine components, fixtures, and structural assemblies where a finer thread pitch than standard metric provides greater holding strength or finer adjustment. The plug chamfer style, with its moderate lead, is appropriate for through-hole and deep blind-hole threading where the operator can start the tap easily without a taper chamfer. Coolant-through capability is not included, so flood or brush-applied cutting fluid should be used to maintain tool life.

Key Features

• M39x3 metric fine thread form for large-diameter precision threading
• 4 straight flutes for consistent chip formation in through-hole applications
• Plug chamfer provides moderate lead-in, suitable for through holes and deeper blind holes
• High-speed steel construction offers toughness across a broad range of workpiece materials
• Bright, uncoated finish — no coating buildup that could alter thread tolerance
• D6 thread limit for controlled tolerance fit on metric fine threads
• Right-hand thread direction, compatible with standard tapping heads and CNC spindles

Compatibility

Designed as an OEM-style replacement or direct-use tap for metalworking operations requiring M39x3 metric fine internal threads. Suitable for use in manual drill presses, tapping machines, lathes, and CNC machining centers equipped with a standard tap holder sized for large-diameter taps.

Installation Notes

This tap should be installed and operated by qualified machinists familiar with large-diameter threading operations. Secure the workpiece firmly and ensure the tapping axis is aligned with the drilled hole before engagement to prevent tap breakage. Apply cutting fluid generously throughout the threading cycle; flood coolant or a brush-applied tapping compound is appropriate since coolant-through is not available on this tool. Reverse the tap periodically to break chips and clear flutes when threading deep holes.