Jergens 31449 Flat Vent Pull Out Dowel Pin 3/4 X 3 in

Product Description

The JERGENS 31449 is a flat vent pull out dowel pin manufactured from alloy steel to Grade C-1215 specification. It measures 0.75 inches in diameter and 3 inches in overall length, with a threaded end to allow removal from blind holes. The flat vent design provides an air-escape channel along the pin body, preventing hydraulic lock during press fitting. This pin conforms to ASME B18.8.2 and is suited for precision fixturing, jig construction, and tooling applications where controlled locating and clean extraction are required. Machinists, toolmakers, and fixture builders are the primary installers.

This pin is used in production tooling, machining fixtures, and assembly jigs where accurate part location is critical. The threaded pull out feature makes it practical in blind-hole configurations where a standard pin could not be driven out from behind. The flat vent channel allows trapped air and lubricants to escape during insertion, reducing the risk of hydraulic resistance in tight-tolerance bores. Typical applications include metal fabrication shops, machine shops, and precision manufacturing environments working with steel tooling plates and fixture bases.

Key Features

• Flat vent channel along pin body prevents hydraulic lock in blind-hole applications
• Threaded end allows controlled extraction using a standard pull out tool
• Alloy steel construction, Grade C-1215, for consistent hardness and machinability
• Tight diameter tolerance of -0.0001 to 0.0001 inches for precise locating fits
• Conforms to ASME B18.8.2 fastener standard for dimensional compliance

Compatibility

Designed as an OEM-style replacement or direct application pin for precision tooling and fixturing systems requiring a 0.75-inch diameter flat vent pull out dowel pin conforming to ASME B18.8.2.

Installation Notes

Installation is typically performed by toolmakers or machinists using a press or mallet with appropriate bore alignment. The receiving bore should be inspected and cleaned before insertion to ensure the tolerance fit is not compromised by debris. Power down all associated equipment before servicing any fixture or tooling assembly. Use a threaded extraction tool matched to the pin end when pulling the pin from a blind hole - do not attempt extraction by driving from the side, as this can damage the bore or pin.