Heli-coil 2093-5 Hand Sti Tap M5 X 0.8 Metric Coarse D3

Product Description

The HELI-COIL 2093-5 is a hand STI tap designed for cutting internal threads in pre-drilled holes to accept Heli-Coil wire thread inserts. Manufactured from high speed steel with a bright finish, it cuts M5 x 0.8 metric coarse threads to a D3 thread limit and a 5H class of fit. The bottoming chamfer style allows threading closer to the bottom of a blind hole, making it the right choice when thread engagement depth is critical. With a 3-flute geometry, this tap offers good chip clearance across a range of workpiece materials. It is a standard hand-drive tool for maintenance, repair, and overhaul applications where stripped or damaged threads need to be restored using insert technology.

This tap is suited for use in aluminum, magnesium, mild steel, and stainless steel workpieces. It is commonly used by machinists, mechanics, and field service technicians performing thread repair on engine components, housings, brackets, and structural assemblies. The bottoming chamfer design is particularly useful in shallow or blind-hole configurations where a taper or plug chamfer cannot fully engage the required thread depth.

Key Features

• M5 x 0.8 metric coarse thread form for use with corresponding Heli-Coil STI inserts
• Bottoming chamfer allows threading to near the bottom of blind holes
• D3 thread limit with 5H class of fit for consistent insert seating
• 3 flutes provide efficient chip evacuation in common repair materials
• High speed steel construction for durability across aluminum, magnesium, mild steel, and stainless steel
• Bright finish with no coating to maintain dimensional accuracy

Compatibility

Designed for use with Heli-Coil STI thread insert systems in M5 x 0.8 metric coarse thread repair applications across aluminum, magnesium, mild steel, and stainless steel substrates.

Installation Notes

This tap is a hand-drive tool and should be used with a tap wrench of appropriate size for the shank diameter. The workpiece must be secured before tapping, and the hole must be drilled to the correct STI tap drill size prior to use. Apply cutting fluid appropriate to the workpiece material, especially when working with stainless steel. Back off periodically to break chips and prevent tap binding or breakage.