Vlier SSLFM12P Locking Knob Handle Plunger M12x1.75

Product Description

The VLIER SSLFM12P is a locking knob handle plunger designed for precise positioning and retention applications in industrial and mechanical assemblies. Built from stainless steel, this spring plunger features an M12x1.75 thread with a 0.65-inch thread length and a knurled locking knob that allows the plunger to be locked in the retracted position for hands-free operation. The maximum plunger diameter is 0.25 inches, and the unit delivers an initial end force of 0.5 pounds with a final end force of 4 pounds. Machinists, tool and die technicians, and mechanical assembly professionals install this type of component in fixtures, jigs, and positioning mechanisms where controlled spring force and lockout capability are required.

The SSLFM12P is suited for use in industrial fixtures, machine tooling, and precision assembly equipment where a locking spring plunger with metric threading is specified. The knurled knob provides a secure grip for manual actuation and retraction. With a body length of 17mm, a plunger projection of 0.25 inches, and a plunger length of 1.4 inches, this plunger fits into standard M12 threaded bores found in tool plates, fixture bodies, and machine frames. It is appropriate for applications requiring repeatable spring-loaded engagement with the added benefit of a locking element to hold the plunger retracted.

Key Features

• Locking knob holds plunger retracted for hands-free part loading and unloading
• M12x1.75 metric thread for compatibility with standard metric threaded bores
• Stainless steel construction for corrosion resistance in demanding environments
• Knurled knob head provides positive manual grip during actuation
• Initial end force of 0.5 pounds ramping to a final end force of 4 pounds for controlled engagement
• Compact 17mm body length suits tight fixture and tooling applications

Compatibility

Designed as an OEM-style replacement or direct-install spring plunger for industrial fixtures, jigs, and machine assemblies requiring an M12x1.75 threaded locking knob handle plunger.

Installation Notes

Installation is performed by machinists or mechanical assembly technicians using a standard wrench sized to the 12mm hex. The mating bore must be tapped to M12x1.75 before installation. Ensure the bore is clean and free of debris before threading the plunger in. Do not overtighten, as this can deform the plunger housing or affect spring force performance.