{"product_id":"vlier-mprtl12p-locking-knob-handle-plunger-m12x1-75","title":"Vlier MPRTL12P Locking Knob Handle Plunger M12x1.75","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER MPRTL12P is a locking knob handle plunger designed for precision positioning and retention applications in industrial and mechanical assemblies. Built with a steel body and a Delrin knob, this spring-loaded plunger uses an M12x1.75 thread and delivers an initial end force of 0.56 pounds (2.5 N) ramping to a final end force of 1.8 pounds (8 N). The locking mechanism holds the plunger in the retracted position, preventing unintended extension during machine setup or part loading. The body measures 1.2 inches in length with a plunger projection of 0.236 inches and a maximum plunger diameter of 0.314 inches. Installation is straightforward for machine builders, tooling engineers, and maintenance technicians working with fixtures, jigs, and indexing equipment.\u003c\/p\u003e\n\u003cp\u003eThe MPRTL12P suits applications where positive plunger lockout is required, such as fixture plates, assembly jigs, machine guarding panels, and indexing tables. The 25mm thread length and M12x1.75 thread size allow installation into standard metric-tapped holes common in industrial tooling. The Delrin knob provides a comfortable, low-torque grip for manual operation without tools. This plunger is appropriate for light-to-medium retention force requirements in both OEM equipment builds and field maintenance situations where repeatable positioning is critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking plunger design holds retracted position to prevent unintended extension\u003c\/li\u003e\n  \u003cli\u003eM12x1.75 thread with 25mm thread length for direct installation into metric-tapped bores\u003c\/li\u003e\n  \u003cli\u003eInitial end force of 0.56 pounds (2.5 N) and final end force of 1.8 pounds (8 N)\u003c\/li\u003e\n  \u003cli\u003eDelrin knob provides manual operation without additional tooling\u003c\/li\u003e\n  \u003cli\u003eSteel body construction for durability in industrial environments\u003c\/li\u003e\n  \u003cli\u003eMaximum plunger diameter of 0.314 inches with a projection of 0.236 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-fit component for industrial fixtures, jigs, and indexing assemblies requiring an M12x1.75 locking knob handle plunger.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machine builders or maintenance technicians using standard metric hand tools. Thread the plunger into a clean, properly tapped M12x1.75 hole and torque using the 0.472 inch hex drive on the body. Ensure the mating bore depth accommodates the 1.2 inch body length and 0.98 inch length under head. Power down or de-energize any associated equipment before installing or servicing plungers in active assemblies.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: M12x1.75\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 25mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 0.56 pounds (2.5 N)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 1.8 pounds (8 N)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1.2 inches (30.48mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\/Shoulder\u003c\/strong\u003e: 0.98 inches (24.89mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.314 inches (7.98mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.236 inches (5.99mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 1.85 inches (46.99mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.98 inches (24.89mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead and Shoulder Height\u003c\/strong\u003e: 0.87 inches (22.10mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 0.472 inches (11.99mm)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Locking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob Style\u003c\/strong\u003e: Delrin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: VLIER\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: MPRTL12P\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52097506509106,"sku":"MPRTL12P","price":71.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/92babc60882fe14aea7a1322b6a9e3e6_8fcc2d37-c3d7-4bf5-b93f-7fadfc809ed2.jpg?v=1790066971","url":"https:\/\/voomisupply.com\/products\/vlier-mprtl12p-locking-knob-handle-plunger-m12x1-75","provider":"Voomi Supply","version":"1.0","type":"link"}