{"product_id":"vlier-prtl250-locking-knob-handle-plunger-1-4-20","title":"Vlier PRTL250 Locking Knob Handle Plunger 1\/4-20","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER PRTL250 is a locking knob handle plunger designed for precision positioning and retention applications in industrial and mechanical assemblies. The plunger features a Delrin knob and a steel body with a black finish, threaded at 1\/4-20 for straightforward installation into standard tapped holes. It delivers an initial end force of 0.12 pounds and a final end force of 0.36 pounds, making it suitable for light-duty indexing, latching, and hold-down tasks. The body length measures 0.63 inches with a thread length of 0.50 inches. Licensed machine builders, toolmakers, and maintenance technicians are the typical installers of this hardware.\u003c\/p\u003e\n\u003cp\u003eThis plunger is used in production machinery, fixtures, jigs, tooling plates, and enclosure panels where a secure, manually operated locking point is needed. The locking knob style allows the operator to retract and lock the plunger in the retracted position, freeing both hands during part loading or adjustment. It is well suited for light-force indexing positions in both OEM equipment builds and field maintenance retrofits across manufacturing and industrial service environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking plunger type allows plunger to be held in retracted position during operation\u003c\/li\u003e\n  \u003cli\u003eDelrin knob provides a comfortable, non-marring grip surface\u003c\/li\u003e\n  \u003cli\u003eSteel construction with black finish for durability and corrosion resistance in shop environments\u003c\/li\u003e\n  \u003cli\u003e1\/4-20 thread size fits standard tapped holes common in tooling and fixture work\u003c\/li\u003e\n  \u003cli\u003eCompact body length of 0.63 inches suits tight clearance installations\u003c\/li\u003e\n  \u003cli\u003eLow end-force range (0.12 to 0.36 pounds) designed for light-duty indexing and latching\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 light-duty locking plunger applications using a 1\/4-20 threaded hole in industrial fixtures, jigs, machinery panels, and tooling assemblies.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by threading the PRTL250 directly into a 1\/4-20 tapped hole using the hex size of 1\/4 inch for torquing. Ensure the mating hole is clean and free of debris before installation. De-energize or lock out any associated machinery before servicing or replacing plunger hardware in active equipment. Do not exceed the rated end force range, as overloading the plunger mechanism can cause premature wear or failure of the locking element.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-20\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 0.12 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 0.36 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.13 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 0.97 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.63 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.50 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\/Shoulder\u003c\/strong\u003e: 0.50 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.50 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead and Shoulder Height\u003c\/strong\u003e: 0.47 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 1\/4 inch\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  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black\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: PRTL250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52113242784050,"sku":"PRTL250","price":30.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/92babc60882fe14aea7a1322b6a9e3e6_d2323a2b-1dde-40cb-9b95-2866a5c1bd20.jpg?v=1790078194","url":"https:\/\/voomisupply.com\/products\/vlier-prtl250-locking-knob-handle-plunger-1-4-20","provider":"Voomi Supply","version":"1.0","type":"link"}