Cleveland C54653 Hand Tap 7/16-14 Unc Plug 4-flute Hss

Product Description

The CLEVELAND C54653 is a 7/16-14 UNC straight-flute hand tap designed for threading operations in both blind holes and through-holes. Built from high speed steel with a bright uncoated finish, this plug-chamfer tap is suited for manual tapping applications where controlled thread starts and consistent Class 2B fit are required. It features 4 flutes and a right-hand thread direction, with an overall length of 3.156 inches and a thread length of 0.88 inches. The H3 thread limit provides a slightly oversized tap geometry to account for material springback, making it a reliable choice for machinists and maintenance tradespeople working with common ferrous and non-ferrous materials.

This tap is intended for use in machine shops, maintenance facilities, and fabrication environments. The plug chamfer — typically 3 to 5 threads of lead — makes it appropriate for both starting new threads and continuing threads in partially tapped holes. It is well suited for threading alloy steel, carbon steel, aluminum, and free-machining stainless steel in production or repair work. The straight-flute design handles both blind and through-hole applications without requiring chip evacuation specific to spiral-flute geometry.

Key Features

• 7/16-14 UNC thread size with right-hand direction and H3 thread limit for Class 2B fit
• Plug chamfer provides 3-5 thread lead-in, suitable for blind and through-hole threading
• 4-flute straight-flute geometry compatible with both blind and through-hole applications
• High speed steel construction for durability across alloy steel, carbon steel, aluminum, and free-machining stainless steel
• Bright uncoated finish — no coating interference on close-tolerance threads
• Shank diameter of 0.323 inches fits standard tap wrench collets and T-handle holders

Compatibility

Designed as an OEM-style replacement or standard tooling selection for manual tapping of 7/16-14 UNC threaded holes in alloy steel, carbon steel, aluminum, and free-machining stainless steel workpieces.

Installation Notes

This tap is installed using a standard tap wrench or T-handle; secure the square drive shank firmly before applying torque. Apply cutting fluid appropriate for the workpiece material before and during tapping to extend tool life and improve thread quality. Back the tap out periodically to break and clear chips, particularly in blind-hole applications. Follow applicable shop safety procedures and ensure the workpiece is securely fixtured before beginning the threading operation.