Cleveland C58544 Spiral Flute Tap 10-24 Unc Hss

Product Description

The CLEVELAND C58544 is a spiral flute tap designed for blind hole threading in metalworking applications. Built from high speed steel with a bright/uncoated finish, it cuts a 10-24 UNC right-hand thread using three fast-helix flutes set at a 52-degree helix angle. The plug chamfer eases thread entry, and the H3 thread limit provides consistent fit within Class 2B and 3B tolerances. With an overall length of 2.375 inches and a thread length of 0.5 inches, this tap is sized for compact blind-hole work in production and repair environments. Machinists and tool and die technicians are the primary users.

This tap is suited for blind hole threading in alloy tool steel, carbon steel, and stainless steel. The 52-degree spiral flute angle lifts chips up and out of the hole, which is the critical advantage over straight-flute taps in blind-bore situations. It is appropriate for both manual tapping and machine tapping setups where chip evacuation is a concern. Series 1093 and 1094 designations apply to this tap.

Key Features

• Spiral flute design at 52-degree helix angle for efficient chip evacuation in blind holes
• High speed steel construction for durability across steel and stainless steel materials
• Plug chamfer for standard thread-starting performance
• H3 thread limit for Class 2B and 3B fit tolerances
• Right-hand flute and right-hand thread orientation
• Bright/uncoated finish — no coating buildup that could affect thread tolerance

Compatibility

Designed for blind hole threading in alloy tool steel, carbon steel, and stainless steel workpieces. Compatible with standard tap holders and machines sized for a 0.194-inch shank diameter. Belongs to Cleveland Series 1093 and 1094.

Installation Notes

This tap is installed by machinists using compatible tap handles or machine tapping heads. Ensure the workpiece is secured and the drill press or tapping machine is powered down before tool changes. Select the correct tap drill size for a 10-24 UNC thread per standard thread drill charts before beginning. Use appropriate cutting fluid for the workpiece material to extend tap life and reduce the risk of tap breakage in blind bores.