Eagle Cutting Tool HT-2500-28-B-I Hand Bottom Tap 1/4-28

Product Description

The EAGLE CUTTING TOOL HT-2500-28-B-I is a 1/4-28 UNF high-speed steel hand bottom tap designed for threading holes to the full depth of a blind bore. Bottom taps feature a minimal chamfer length, allowing threads to be cut as close to the bottom of a hole as possible. This tap is intended for hand tapping operations and suits work in steel, aluminum, brass, and similar materials. Licensed plumbers, pipefitters, electricians, and general trade mechanics reaching for a precision threaded fastener solution in 1/4-28 fine-thread applications will find this tap fits standard hand tap wrench tooling.

This tap is suited for use in light industrial and trade shop environments where fine-thread 1/4-28 UNF blind-hole threading is required. Typical applications include threading mounting holes for instrument fittings, electrical enclosure hardware, and mechanical assemblies where a coarse-thread tap would not provide the required thread pitch. The bottom-tap geometry makes it the finishing tap in a standard tap sequence after a taper or plug tap has started the thread.

Key Features

• 1/4-28 UNF thread form for fine-pitch threading applications
• High-speed steel construction for durability and wear resistance
• Bottom-tap chamfer geometry threads blind holes to maximum depth
• Designed for hand tapping with standard tap wrenches
• Minimum order quantity of 1 unit — suitable for single-job procurement

Compatibility

Designed as a direct-fit hand bottom tap for any application requiring a 1/4-28 UNF thread in a blind or through hole, compatible with standard hand tap wrench drive sizes for this tap diameter.

Installation Notes

This tap is installed by a mechanic or tradesperson using a hand tap wrench with appropriate cutting fluid applied to reduce friction and extend tap life. Always start with a taper or plug tap before using the bottom tap to avoid overloading the tool in an unprepared hole. Back the tap off periodically to break chips and prevent binding. Do not force the tap if resistance increases sharply, as high-speed steel taps are brittle and can break if torqued beyond their limit.

Technical Specifications

• Thread Size: 1/4-28 UNF
• Tap Type: Hand Bottom Tap
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-2500-28-B-I