Eagle Cutting Tool HT-3125-18-B-I 5/16-18 Hss Hand Tap

Product Description

The EAGLE CUTTING TOOL HT-3125-18-B-I is a 5/16-18 high-speed steel (HSS) hand bottom tap designed for threading operations requiring thread engagement close to the bottom of a blind hole. The bottom chamfer style leaves only 1-2 threads of lead-in, making it the right choice when full thread depth in a stopped bore is required. At 0.31 pounds, this is a lightweight, single-piece tool sized for hand tapping with a tap wrench or T-handle in shop, field, or maintenance environments.

This tap is suited for threading 5/16-18 UNC (Unified National Coarse) threads in ferrous and non-ferrous metals, plastics, and similar materials. Bottom taps are commonly used in machining, mechanical maintenance, HVAC equipment assembly, and plumbing fixture repair where through-taps or plug taps have already started the thread and final bottoming is needed. Machinists, maintenance technicians, and skilled tradespeople working on equipment with blind threaded holes will reach for this tool when thread depth cannot be compromised.

Key Features

• Bottom chamfer style provides maximum thread depth in blind holes
• High-speed steel (HSS) construction handles hand-tapping loads across a range of common materials
• 5/16-18 UNC thread form is one of the most common fastener sizes in trade applications
• Lightweight at 0.31 pounds for easy single-hand use with standard tap wrenches
• Import designation indicates cost-effective sourcing for general-purpose tapping tasks

Compatibility

Designed as a general-purpose hand bottom tap for 5/16-18 UNC thread applications. Compatible with standard tap wrench drives. No specific equipment or model compatibility is stated by the manufacturer for this SKU.

Installation Notes

Installation should be performed by a machinist or qualified maintenance technician familiar with hand tapping procedures. Always secure the workpiece firmly before tapping, and use an appropriate cutting fluid to extend tool life and improve thread quality. Back the tap off periodically to break chips, especially in deeper blind holes. Inspect the tap for wear or chipping before each use, as a damaged tap can seize in the hole or produce out-of-tolerance threads.

Technical Specifications

• Thread Size: 5/16-18 UNC
• Tap Type: Hand Bottom Tap
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-3125-18-B-I