Vlier D58 Threaded Ball Plunger 3/8-16 Delrin Stainless

Product Description

The VLIER D58 is a threaded ball plunger designed to provide controlled end force in positioning, indexing, and detent applications. It features a Delrin body with a stainless steel ball measuring 0.187 inches in diameter and a maximum ball reach of 0.053 inches. The 3/8-16 threaded body measures 0.625 inches in length, delivering an initial end force of 5 pounds and a final end force of 10 pounds. This plunger is installed by mechanical assemblers, toolmakers, and machine builders in industrial and manufacturing settings where repeatable positioning force is required.

The D58 is suited for applications requiring controlled, consistent detent force on production fixtures, jigs, tooling plates, and machine assemblies. The Delrin body offers low friction and corrosion resistance, while the stainless steel ball provides durability at the contact point. Its purple color code allows for quick visual identification in multi-plunger assemblies. The 3/8-16 thread makes installation straightforward in tapped bores matching that thread specification.

Key Features

• 3/8-16 threaded body for standard tapped-bore installation
• Delrin body provides low friction and corrosion resistance
• Stainless steel ball for durable, long-lasting contact
• Initial end force of 5 pounds, final end force of 10 pounds for controlled detent action
• Maximum ball reach of 0.053 inches suits shallow detent groove applications
• Purple color code for fast visual identification in assemblies

Compatibility

Designed as an OEM-style replacement or direct installation component for machinery, fixtures, and tooling assemblies that accept a 3/8-16 threaded ball plunger with controlled end force specifications.

Installation Notes

Install using a wrench or hex key appropriate for the body drive style into a clean, properly tapped 3/8-16 threaded bore. Ensure the bore depth and detent groove geometry are compatible with the 0.053-inch maximum ball reach before installation. De-energize or lock out any associated machinery before servicing or replacing plungers in active assemblies. Do not overtighten, as Delrin bodies can crack under excessive torque.