Osg 1311500 Npt Pipe Tap 3/4-14 5 Flute Hss

Product Description

The OSG 1311500 is a standard NPT pipe tap designed to cut 3/4-14 National Pipe Taper threads in metal workpieces. Built from high-speed steel (HSS) with a bright, uncoated finish, this tap is suited for threading operations in aluminum and similar materials. It features 5 flutes and a high hook angle to promote efficient chip evacuation during the tapping process. With an overall length of 3.252 inches and a thread length of 1.375 inches, this tap is sized for typical pipe thread applications in fabrication, plumbing rough-in, and HVAC piping work. It is installed by machinists, pipefitters, and HVAC technicians requiring reliable hand or machine tapping of pipe-thread connections.

This tap is used in residential and commercial applications wherever NPT pipe thread connections must be cut into tapped holes. Common scenarios include threading pipe fittings into manifolds, valve bodies, equipment housings, and mechanical components. The 3/4-14 NPT thread size is a standard in plumbing, HVAC, and industrial piping systems. The Series 108AL designation indicates this tap is optimized for aluminum material applications, making it a practical choice for light-metal fabrication and service work.

Key Features

• 3/4-14 NPT thread profile for standard pipe thread connections
• High-speed steel construction for durability in production and service use
• 5-flute design with high hook angle for efficient chip removal
• Bright uncoated finish suitable for use with cutting fluids
• Series 108AL optimized for aluminum material applications
• Overall length of 3.252 inches with a 1.375-inch thread length

Compatibility

Designed for cutting 3/4-14 NPT threads in aluminum and compatible materials; verify workpiece material and pre-drill tap drill size per NPT standard requirements before use.

Installation Notes

This tap is installed by qualified machinists, pipefitters, or HVAC technicians using a tap handle or machine tapping setup. Always use an appropriate cutting fluid for the workpiece material to extend tap life and improve thread quality. Ensure the tap is started square to the hole to prevent thread misalignment or tap breakage. Follow applicable codes such as IFGC or IPC for pipe thread engagement requirements in gas and plumbing systems.