Jergens 31403 Flat Vent Pull Out Dowel Pin 1/4 X 1-1/4 in

Product Description

The JERGENS 31403 is a flat vent pull out dowel pin designed for precision locating and alignment applications in industrial and manufacturing environments. Machined from C-1215 alloy steel, it measures 0.25 inches in diameter and 1.25 inches in overall length with a tightly controlled diameter tolerance of -0.0001 to 0.0001 inches. The threaded end design allows for controlled extraction without damage to the mating component. This pin meets ASME B18.8.2 standards, making it a direct fit for applications requiring certified fastener performance. Machinists, toolmakers, and maintenance technicians are the primary installers of this component.

This dowel pin is suited for use in jigs, fixtures, dies, and precision tooling assemblies where consistent part registration is required. The flat vent feature allows trapped air and fluid to escape during press-fit installation, reducing hydraulic lock and the risk of bore damage. It is commonly used in machine shops, production lines, and tool-and-die operations across light and heavy manufacturing settings.

Key Features

• Threaded end allows controlled pull-out without bore damage
• Flat vent design prevents hydraulic lock during press-fit installation
• C-1215 alloy steel construction for strength and machinability
• Diameter tolerance of -0.0001 to 0.0001 inches for precision fit
• Meets ASME B18.8.2 fastener standard

Compatibility

Designed as an OEM-style replacement or direct-install component for jigs, fixtures, and tooling assemblies requiring a 0.25-inch precision dowel pin per ASME B18.8.2 specification.

Installation Notes

Installation is typically performed by machinists or tool-and-die technicians using a press or mallet with a proper drive tool. Ensure the receiving bore is clean, deburred, and within tolerance before pressing the pin. The threaded end should remain accessible for future extraction using a standard pull-out tool. Never drive the pin with direct impact to the threaded end, as this will damage the extraction threads.