Jergens 26773 Threaded Spring Plunger M8 X 1.25

Product Description

The JERGENS 26773 is a short-style threaded spring plunger designed for indexing, locating, and positioning applications in machine fixtures, jigs, and tooling assemblies. The plunger features an M8 x 1.25 thread with a 16 mm thread length, a maximum plunger diameter of 3.43 mm, and a 5 mm projection. The steel body includes a locking element to secure the plunger position once set, preventing loosening from vibration during operation. The nose is constructed from Delrin or steel depending on the application requirement. A black finish on the body provides basic corrosion resistance. This component is typically installed by machinists, tool and die makers, and mechanical assemblers working with fixturing and workholding setups.

The JERGENS 26773 is suited for light-duty indexing and detenting applications in industrial and manufacturing environments. It fits M8 x 1.25 threaded through-holes or blind holes in fixture plates, jig bodies, and machine components. Initial end force is 0.23 kg and final end force is 4.54 kg, making it appropriate for applications requiring controlled, repeatable spring resistance during engagement and release. The locking element allows the installed plunger to be torqued in place without requiring thread-locking compounds in most setups.

Key Features

• M8 x 1.25 thread with 16 mm thread length for standard metric fixture holes
• 3.43 mm maximum plunger diameter with 5 mm projection
• Steel body with black finish for durability and basic corrosion resistance
• Delrin and steel nose material options for controlled wear characteristics
• Built-in locking element resists loosening under vibration
• Initial end force of 0.23 kg and final end force of 4.54 kg for light-duty indexing

Compatibility

Designed as a direct-fit replacement or original-specification spring plunger for M8 x 1.25 threaded holes in industrial fixtures, jig plates, and workholding components requiring a short-length plunger with locking element.

Installation Notes

Installation is typically performed by a machinist or mechanical assembler using a hex wrench sized for the plunger body. Ensure the receiving threaded hole is clean and properly tapped to M8 x 1.25 before installation. The locking element should be engaged to the manufacturer specification to prevent back-out during service. De-energize or lock out any powered equipment before accessing fixtures containing spring plungers.