{"product_id":"vlier-pr500p-locking-pull-ring-plunger-1-2-13-steel","title":"Vlier PR500P Locking Pull Ring Plunger 1\/2-13 Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER PR500P is a locking pull ring plunger designed for precision positioning and retention applications in industrial and mechanical assemblies. The plunger features a 5\/16-inch (0.312-inch) diameter tip with 1\/2 inch of projection and delivers an initial end force of 2.5 pounds ramping to a final end force of 5 pounds, providing reliable, controlled resistance. The locking element engages via a pull ring mechanism that holds the plunger in the retracted position until released, making it well suited for fixtures, tooling, jigs, and adjustable assemblies. Licensed tradespeople and machine builders working with positioning hardware will find the steel construction durable across demanding production environments.\u003c\/p\u003e\n\u003cp\u003eThe PR500P threads into any 1\/2-13 UNC tapped hole with a thread length of 1.4 inches and a body length of 2 inches. It is appropriate for use in machine tool fixtures, assembly jigs, workholding equipment, and general industrial positioning systems where a repeatable spring-loaded retention point is required. The pull ring with a 1.26-inch ring diameter allows for easy manual retraction without tools, making it practical in high-cycle or operator-facing applications.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking pull ring mechanism holds plunger retracted until manually released\u003c\/li\u003e\n  \u003cli\u003eInitial end force of 2.5 pounds with final end force of 5 pounds for consistent retention\u003c\/li\u003e\n  \u003cli\u003e1\/2-13 UNC thread size with 1.4-inch thread length for standard tapped-hole installation\u003c\/li\u003e\n  \u003cli\u003ePlunger diameter of 0.312 inches and 0.5-inch projection for precise locating\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in industrial and production environments\u003c\/li\u003e\n  \u003cli\u003ePull ring diameter of 1.26 inches enables easy finger-pull retraction\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned for installation in any application with a standard 1\/2-13 UNC tapped hole requiring a spring-loaded locking plunger with pull ring retention.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by threading the PR500P into a prepared 1\/2-13 UNC tapped hole by hand or with an appropriate wrench on the hex head. Ensure the mating hole is clean and free of debris before installation. De-energize or lock out any powered equipment before servicing assemblies that incorporate spring plungers. Do not over-torque the body, as this may affect the locking element function or plunger 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 UNC\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1.4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.6 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Diameter\u003c\/strong\u003e: 0.312 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 2 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRing Diameter\u003c\/strong\u003e: 1.26 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 2.5 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 5 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Locking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: Yes\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: PR500P\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52000668385586,"sku":"PR500P","price":34.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f23cf456295537cef2b583828cc6880a.jpg?v=1789996589","url":"https:\/\/voomisupply.com\/products\/vlier-pr500p-locking-pull-ring-plunger-1-2-13-steel","provider":"Voomi Supply","version":"1.0","type":"link"}