Osg 1141900 Straight Flute Tap 7/16-14 Unc Plug Hss

Product Description

The OSG 1141900 is a straight flute plug tap designed for cutting internal threads in a wide range of ferrous and non-ferrous workpiece materials. Built from high-speed steel with a bright, uncoated finish, it produces a 7/16-14 UNC right-hand thread. The plug chamfer provides a moderate lead-in of 3 to 5 threads, making it suitable for through-hole and moderately deep blind-hole applications. With 4 flutes and an H5 thread limit, the 1141900 delivers consistent thread tolerance control in production and maintenance machining environments. It measures 3-5/32 inches overall with a 1-7/16 inch thread length, and it does not require coolant-through capability.

This tap is intended for use in manual, CNC, and turret machine tapping setups. It is well-suited to tapping aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel. The 7/16-14 UNC thread form is a common fastener standard found in structural, mechanical, and fabrication work across commercial and industrial applications. Machinists, tool and die makers, and maintenance technicians regularly specify this tap for general-purpose threading tasks.

Key Features

• 7/16-14 UNC thread form with right-hand cut for standard fastener applications
• Plug chamfer style for use in through-holes and shallow blind holes
• High-speed steel construction provides durability across a broad material range
• H5 thread limit for consistent tolerance control in production threading
• 4 straight flutes for chip control in shorter-chip materials such as cast iron and aluminum
• No coolant-through requirement simplifies setup on standard machine configurations

Compatibility

Designed as a standard OEM-style straight flute tap compatible with 7/16-14 UNC threading applications in aluminum, cast aluminum, cast iron, low-carbon steel, medium-carbon steel, and high-carbon steel workpieces.

Installation Notes

Installation and use should be performed by qualified machinists familiar with tapping speeds, feeds, and cutting fluid requirements for the specific workpiece material. Always secure the workpiece and verify spindle alignment before engaging the tap. Back the tap out periodically to clear chips and prevent binding, particularly in deeper holes. Follow applicable shop safety practices and machine manufacturer guidelines for tapping operations.