Jergens 31411 Flat Vent Pull Out Dowel Pin 5/16x1-1/4 Alloy Steel

Product Description

The JERGENS 31411 is a flat vent pull out dowel pin designed for precise component alignment and location in tooling, fixtures, and machined assemblies. Manufactured from C-1215 alloy steel, this pin meets ASME B18.8.2 dimensional standards, ensuring consistent fit and interchangeability across precision applications. It measures 5/16 inch in diameter with an overall length of 1.25 inches and features a threaded end for controlled extraction without damage to mating bores. The flat vent design allows air and fluid to escape during insertion, reducing hydraulic lock. Machinists, tool and die makers, and maintenance technicians working with jigs, fixtures, and precision assemblies install this type of pin routinely.

This pin is suited for industrial tooling and fixture applications where repeatable alignment and easy removal are required. The threaded pull out end allows the pin to be extracted using a standard slide hammer or threaded puller, making it appropriate for applications where press-fit pins are difficult to drive out. Typical uses include locating workholding fixtures, die sets, mold assemblies, and machine tool components that require frequent disassembly and reassembly.

Key Features

• Flat vent design prevents hydraulic lock during pin insertion into blind or tight bores
• Threaded end allows controlled extraction with a puller tool, protecting bore integrity
• C-1215 alloy steel construction provides good machinability and wear resistance for tooling applications
• Meets ASME B18.8.2 standard for dimensional accuracy and interchangeability
• Tight diameter tolerance of -0.0001 to 0.0001 inches ensures precision locating fit

Compatibility

Designed as a standard OEM-style replacement or new-installation locating pin for precision tooling, jigs, fixtures, and machine assemblies requiring a 5/16 inch diameter flat vent pull out dowel pin conforming to ASME B18.8.2.

Installation Notes

Installation and removal of precision dowel pins is typically performed by machinists or tool and die professionals. Before servicing any fixture or assembly, ensure the workpiece is fully de-energized and secured. Use appropriate extraction tooling threaded into the pull out end - do not drive or strike the threaded end, as this can damage the thread form and bore. Verify bore diameter and finish meet ASME B18.8.2 requirements before installation.