Eagle Cutting Tool HT-356-B-I 3-56 Hss Hand Bottom Tap

Product Description

The EAGLE CUTTING TOOL HT-356-B-I is a 3-56 high-speed steel (HSS) hand bottom tap designed for threading operations that require cutting threads to the bottom of a blind hole. The bottom tap geometry features minimal lead threads, allowing the tap to reach full thread depth closer to the base of the hole than taper or plug taps. At 0.31 pounds, this is a lightweight hand tool suited for bench work and field threading by machinists, maintenance technicians, and trade professionals working with small-diameter fastener threads.

This tap is intended for use in applications requiring 3-56 UNC thread form in blind holes where thread engagement must extend as deep as possible. Typical use cases include instrument panels, electrical enclosures, small mechanical assemblies, and precision sheet metal work. It is operated by hand using a standard tap wrench and is appropriate for use in ferrous and non-ferrous materials at this thread size.

Key Features

• Bottom tap style for threading to the base of blind holes
• 3-56 thread size for small-diameter, fine-pitch fastener applications
• High-speed steel (HSS) construction for durability across a range of materials
• Lightweight at 0.31 pounds for easy hand operation
• Minimum order quantity of 1 for single-unit procurement

Compatibility

Designed as a replacement or supplementary bottom tap for hand threading operations requiring 3-56 thread form; consult your tap wrench specifications to confirm shank compatibility before use.

Installation Notes

This tap is installed by hand using a standard tap wrench — power driving is not recommended for taps at this thread size due to breakage risk. Ensure the workpiece is securely clamped before starting. Apply appropriate cutting fluid to extend tap life and reduce friction. Clear chips frequently during use, especially in blind holes, to prevent binding and tap breakage.

Technical Specifications

• Thread Size: 3-56
• Tap Type: Hand Bottom
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds
• Minimum Order Quantity: 1

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-356-B-I