Vlier SL375 Knob Handle Spring Plunger 3/8-16 Thread

Product Description

The VLIER SL375 is a knob handle spring plunger designed for positioning, indexing, and locating applications in mechanical assemblies. It features a 3/8-16 thread size with a 0.75 inch thread length and a knurled knob head for manual actuation without tools. The plunger delivers an initial end force of 1 pound and a final end force of 8 pounds, making it suitable for light-duty holding and detent functions. Constructed from steel with a zinc gold chromate finish, the SL375 offers corrosion resistance in general industrial environments. Machinists, maintenance technicians, and assembly line professionals install this type of hardware in jigs, fixtures, and positioning mechanisms.

The SL375 is used in industrial and mechanical assembly settings where repeatable positioning or manual indexing is required. Its non-locking plunger design allows smooth engagement and release without a secondary locking step. The knurled knob provides a secure grip for hand-tightening into tapped holes. Typical applications include fixture plates, tooling bodies, equipment panels, and machine frames where a threaded spring plunger with manual adjustment is needed.

Key Features

• 3/8-16 thread size with 0.75 inch thread length for standard tapped-hole installation
• Non-locking plunger with 0.185 inch maximum plunger diameter and 0.218 inch plunger projection
• 1 pound initial end force to 8 pound final end force for light-duty detent and positioning duty
• Knurled knob head allows hand-tightening and adjustment without additional tools
• Steel construction with zinc gold chromate finish for corrosion resistance
• Compact body length of 0.94 inches suits space-constrained installations

Compatibility

Designed as a standard-thread spring plunger for use in any tapped 3/8-16 hole in industrial fixtures, jigs, tooling plates, or mechanical assemblies requiring a non-locking knob-style plunger.

Installation Notes

Installation is performed by hand-threading the SL375 into a pre-tapped 3/8-16 hole using the knurled knob. Ensure the mating hole is clean and free of debris before installation. Disengage or de-energize any moving components in the assembly before servicing or replacing spring plungers. Do not exceed the rated end force range by forcing the plunger beyond its designed travel.