Vlier DB48 Threaded Ball Plunger 6-40 Steel Nylon Ball

Product Description

The VLIER DB48 is a threaded ball plunger designed for precise positioning, detenting, and light-duty indexing applications in mechanical assemblies. It features a zinc-plated steel body and a nylon ball, making it well suited for applications where a softer contact point is needed to avoid marring mating surfaces. The 6-40 thread size allows installation in compact assemblies. Initial end force is 0.5 pounds and final end force is 1 pound, providing a light, consistent spring load. Maximum ball reach is 0.023 inches with a ball diameter of 0.078 inches and a body length of 0.312 inches. Machinists, toolmakers, and mechanical assemblers typically specify this component.

The DB48 is used in jigs, fixtures, tooling plates, and precision mechanical assemblies where repeatable low-force detenting or part location is required. The nylon ball is appropriate for use against delicate or softer mating surfaces where a steel ball would cause wear or surface damage. The small 6-40 thread profile makes it a practical choice for miniature assemblies and compact mechanisms across light industrial and instrumentation applications.

Key Features

• 6-40 thread size for installation in compact and miniature assemblies
• Nylon ball contact minimizes surface damage on mating components
• Zinc-plated steel body provides corrosion resistance in general-use environments
• 0.5 pound initial end force and 1 pound final end force for light, consistent detenting
• 0.078 inch ball diameter with 0.023 inch maximum ball reach
• Purple color code for quick field identification during assembly

Compatibility

Designed as an OEM-style replacement or direct-use component for mechanical assemblies, jigs, and fixtures requiring a 6-40 threaded ball plunger with a nylon ball contact point.

Installation Notes

Installation is performed by machinists or mechanical assemblers using standard hand tools appropriate for 6-40 threaded fasteners. Ensure the mating threaded bore is clean and properly tapped to 6-40 specification before installation. Do not overtighten, as excessive torque can damage the small-diameter thread or affect spring preload. Verify ball reach and end force requirements are met for the specific detenting or positioning application before final assembly.