Osg 1136700 Straight Flute Tap 1-14 Uns Plug Hss

Product Description

The OSG 1136700 is a straight flute tap designed for threading 1-14 UNS internal threads in a range of ferrous and non-ferrous materials. Built from high-speed steel with a bright uncoated finish, this tap features four flutes and a plug chamfer for progressive thread engagement. It carries a 3B class of fit and an H4 thread limit, making it suitable for standard tolerance threaded holes. With an overall length of 5.125 inches and a thread length of 2.5 inches, it is sized for larger-diameter tapping work. Machinists and toolroom professionals install this tap in vertical mills, drill presses, and manual tapping setups.

This tap is suited for production and maintenance tapping operations in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The plug chamfer style - with its gradual lead-in - makes it appropriate for through-hole applications where the tap can pass fully through the workpiece. Right-hand thread direction is standard for conventional tapping. Series 101 construction follows OSG tooling standards for this diameter and pitch range.

Key Features

• 1-14 UNS thread form, right-hand direction
• Plug chamfer for progressive engagement in through-hole applications
• 4 flutes with H4 thread limit for 3B class of fit tolerance control
• High-speed steel construction - handles steel, cast iron, and aluminum workpieces
• Bright uncoated finish - ready to use as supplied, compatible with standard cutting fluids
• No coolant-through design - suitable for conventional flood or manual lubrication

Compatibility

Designed for tapping 1-14 UNS through holes in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. Compatible with standard tap holders and tapping attachments sized for a 0.8-inch shank diameter.

Installation Notes

This tap is installed by a machinist or toolroom technician using a tap wrench, tapping head, or CNC rigid tapping setup. Always secure the workpiece and align the tap perpendicular to the drilled hole before engagement. Power down or de-energize any machine spindle before manually changing or inspecting the tap. Apply appropriate cutting fluid for the workpiece material - cutting oil for steel and iron, light lubricant or flood coolant for aluminum - to extend tool life and maintain thread quality.