Eagle Cutting Tool HT-3125-24-P-I 5/16-24 Hss Hand Plug Tap

Product Description

The EAGLE CUTTING TOOL HT-3125-24-P-I is a 5/16-24 high-speed steel (HSS) hand plug tap designed for cutting internal threads by hand in metal workpieces. The plug chamfer — typically 3 to 5 threads of taper — makes it the most common starting tap for through-holes and moderately deep blind holes. Built from HSS, it holds an edge under the friction and heat of hand tapping, making it a reliable choice for machinists, maintenance technicians, pipefitters, and HVAC and plumbing service pros who need clean, accurate threads in the field or shop.

This tap is suited for threading 5/16-inch diameter holes at 24 threads per inch (UNF fine thread series) in steel, aluminum, cast iron, brass, and similar machinable materials. Fine-thread applications include fastener repairs on HVAC equipment panels, electrical enclosures, plumbing fixture hardware, and general mechanical assemblies where a finer pitch provides greater holding strength or closer thread adjustment than coarse-thread alternatives.

Key Features

• 5/16-24 UNF fine-thread profile for precise thread cutting in smaller diameter applications
• High-speed steel construction resists heat and wear during hand tapping operations
• Plug chamfer design balances starting ease with thread depth capability in through-holes and blind holes
• Hand tap configuration compatible with standard tap wrenches and T-handle drivers
• Minimum order quantity of 1 — available as a single unit for service truck stocking

Compatibility

Designed as a standard 5/16-24 UNF hand plug tap suitable for use in any application requiring fine internal threads at that size. No specific equipment compatibility data was provided for this SKU.

Installation Notes

This tap is installed by hand using a tap wrench; always align the tap perpendicular to the workpiece surface before applying torque to avoid cross-threading or tap breakage. Apply cutting fluid or tapping oil to extend tool life and improve thread finish in steel and other ferrous metals. Back off the tap periodically — roughly a half turn for every full turn — to break chips and prevent binding. Follow applicable shop safety practices and ensure the workpiece is securely clamped before tapping.

Technical Specifications

• Thread Size: 5/16-24 UNF
• Thread Type: Fine (UNF)
• Tap Style: Hand Plug
• Material: High-Speed Steel (HSS)
• Weight: 0.31 pounds

Standard Information

• Brand: EAGLE CUTTING TOOL
• Manufacturer Part Number: HT-3125-24-P-I