Vlier PH4 Stock Crowder Spring Plunger Gold Ring Plate

Product Description

The VLIER PH4 is a stock crowder spring plunger designed for precision positioning and holding applications in mechanical assemblies. This plunger features a gold ring plate and a steel body, with a force range of 5 to 10 pounds and an outside diameter of 0.875 inches. The 8-32 UNC threaded shank allows for straightforward installation into tapped holes in tooling plates, fixtures, jigs, and machine components. Machinists, toolmakers, and mechanical assemblers install this type of component when a reliable, repeatable locating or detenting force is required in a compact footprint.

The PH4 is suited for use in production tooling, fixture plates, and precision mechanical assemblies where consistent spring force and positive part location are critical. Its compact dimensions, with a head height of 15/32 inches and a length under head of 7/32 inches, make it appropriate for applications with limited clearance. The gold ring plate aids in visual identification during installation and servicing. This plunger is installed by machinists and tool and die professionals in both light manufacturing and precision assembly environments.

Key Features

• Force range of 5 to 10 pounds for reliable positioning and detenting performance
• Outside diameter of 0.875 inches for consistent fit in standard bores
• 8-32 UNC threaded shank for direct installation into tapped fixture or tooling holes
• Gold ring plate provides quick visual identification during assembly and maintenance
• Steel construction for durability in production tooling environments
• Compact head height of 15/32 inches suitable for low-clearance applications

Compatibility

Designed as an OEM-style replacement or direct-install spring plunger for mechanical fixtures, tooling plates, and precision positioning assemblies that accept 8-32 UNC threaded spring plungers with a 0.875-inch outside diameter.

Installation Notes

Installation requires a properly tapped 8-32 UNC hole in the mating fixture or tooling plate. Ensure the receiving bore is clean and free of debris before threading in the plunger. Use appropriate hand tools and avoid over-torquing, which can damage the plunger body or distort the ring plate. Verify force range requirements are met before finalizing installation in the assembly.