Vlier SFRM12 Locking L Handle Plunger M12x1.75

Product Description

The VLIER SFRM12 is a stainless steel locking spring plunger with an L-style handle, designed for precision positioning and locking applications in industrial assemblies. The M12x1.75 thread and 28.19mm (1.11 inches) thread length allow secure installation into tapped bores. The 7mm plunger diameter delivers an initial end force of 4.5 N and a final end force of 22.3 N, giving technicians a defined resistance range for repeatable indexing and holding. The locking handle design prevents unintended rotation once set, making it well suited for fixtures, jigs, and machine tooling where position must be maintained under vibration or repeated cycling.

The SFRM12 is used in manufacturing, tooling, and mechanical assembly applications where a threaded plunger must hold a component in a fixed position without a separate locking fastener. The 54mm body length, 32mm length under head, and 19mm plunger projection suit panel-mount and through-bore installations common in fixture plates, enclosures, and positioning jigs. Fabricators, millwrights, and machine builders typically specify this style of plunger for light-to-medium duty indexing tasks in both OEM equipment builds and field maintenance situations.

Key Features

• M12x1.75 thread form with 1.11 inches (28.19mm) thread length for standard metric tapped bores
• Locking L handle prevents unintended plunger rotation during service
• End force range of 4.5 N initial to 22.3 N final for controlled indexing resistance
• 7mm plunger diameter with 19mm projection for positive engagement depth
• Stainless steel construction for corrosion resistance in washdown or outdoor environments
• 54mm body length with 21.34mm head height for low-profile panel installations

Compatibility

Designed as a direct-fit replacement or OEM-style spring plunger for metric M12x1.75 threaded bores in industrial fixtures, jigs, and positioning assemblies.

Installation Notes

Installation is performed by threading the SFRM12 into a pre-tapped M12x1.75 bore using the L handle or an appropriate wrench on the hex feature. Ensure the bore is clean and free of debris before threading in the plunger. Do not overtighten, as excessive torque can damage the plunger mechanism or the tapped bore. Disengage the locking element and verify full plunger travel before returning the assembly to service.