{"product_id":"vlier-prt500-knob-handle-plunger-1-2-13-non-locking","title":"Vlier PRT500 Knob Handle Plunger 1\/2-13 Non-locking","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER PRT500 is a non-locking knob handle plunger designed for indexing, positioning, and spring-loaded engagement applications in industrial and mechanical assemblies. The plunger features a 1\/2-13 threaded body and a Delrin knob for manual actuation without tools. Initial end force is 0.5 pounds, building to a final end force of 1.75 pounds, making it suitable for light-duty positioning tasks where repeatable spring resistance is required. The steel construction with black finish provides corrosion resistance suitable for typical shop and production environments. Machinists, tool and die technicians, and assembly line maintenance personnel are the primary installers of this component.\u003c\/p\u003e\n\u003cp\u003eThe PRT500 is used in fixtures, jigs, tooling plates, and machine panels where a manually retractable plunger is needed to locate or retain a component without a locking mechanism. The 1\/2-13 thread allows installation into standard tapped holes in steel or aluminum assemblies. With a body length of 1.25 inches and a plunger projection of 0.25 inches, it fits into tight panel sections or shallow mounting bosses. Applications include production tooling, drawer stops, panel latching, and equipment positioning systems across light manufacturing and automation environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNon-locking plunger design allows free retraction under manual pressure\u003c\/li\u003e\n  \u003cli\u003eDelrin knob provides tool-free hand actuation\u003c\/li\u003e\n  \u003cli\u003e0.5 pound initial to 1.75 pound final end force for consistent spring resistance\u003c\/li\u003e\n  \u003cli\u003e1\/2-13 thread for installation into standard tapped holes\u003c\/li\u003e\n  \u003cli\u003eSteel body with black finish for durability in industrial settings\u003c\/li\u003e\n  \u003cli\u003eCompact 1.25 inch body length suited for shallow panel or fixture mounting\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 standard 1\/2-13 tapped-hole plunger applications in industrial fixtures, tooling assemblies, and mechanical positioning systems.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by threading the PRT500 body into a prepared 1\/2-13 tapped hole using the hex across the body. Ensure the mating bore is clean and free of debris before installation. Disengage or de-energize any moving machinery before servicing or replacing plunger components. Do not exceed the rated end force by modifying or preloading the spring beyond its designed travel.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Non-Locking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 0.5 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 1.75 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.31 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 1.9 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\/Shoulder\u003c\/strong\u003e: 1.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 1.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead and Shoulder Height\u003c\/strong\u003e: 0.9 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.0 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 1\/2 inch\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  \u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: No\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: PRT500\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52097137606962,"sku":"PRT500","price":22.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/ac6df802b74d66e9438e8e365dee6cab.jpg?v=1790066738","url":"https:\/\/voomisupply.com\/products\/vlier-prt500-knob-handle-plunger-1-2-13-non-locking","provider":"Voomi Supply","version":"1.0","type":"link"}