Osg 2727000 Round Threading Die 4-40 Unc Hss Right Hand

Product Description

The OSG 2727000 is a round adjustable threading die designed to cut external threads to the 4-40 UNC specification. Made from high-speed steel, this die holds up under the heat and friction of threading iron and steel workpieces. It has an outside diameter of 0.8125 inches and a thickness of 0.25 inches, making it compatible with standard round die stocks sized for that OD. The adjustable design lets technicians and machinists fine-tune thread fit without swapping tooling. Right-hand thread direction matches the standard fastener orientation for the vast majority of mechanical assembly applications.

This die is suited for threading 4-40 screws and fasteners in ferrous materials including iron and steel. It fits into the Series 134 product line and is well matched to precision threading tasks in machine shops, maintenance environments, and tool rooms where UNC thread standards are required. The compact size makes it practical for benchtop die stock use in both production and repair applications.

Key Features

• 4-40 UNC thread form for standard inch-series fastener production
• High-speed steel construction resists heat buildup during threading operations
• Adjustable die allows thread fit to be fine-tuned without additional tooling
• Right-hand thread direction for standard fastener assembly
• 0.8125 inch outside diameter fits standard round die stocks of that size
• Rated for use on iron and steel workpiece materials

Compatibility

Designed for use on iron and steel workpieces requiring 4-40 UNC external threads. Fits standard round die stocks accepting an 0.8125 inch outside diameter die.

Installation Notes

This die is installed and operated by machinists, toolmakers, or maintenance technicians using a compatible round die stock handle. Secure the die firmly in the die stock set screws before use and apply cutting oil to the workpiece to reduce heat and extend die life. Inspect the die for chipping or wear before each use and replace if thread quality degrades. Do not use on hardened steel or materials outside the rated application range.