{"product_id":"vlier-prsn250p-pull-ring-plunger-1-4-20-steel","title":"Vlier PRSN250P Pull Ring Plunger 1\/4-20 Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER PRSN250P is a steel pull ring plunger designed for precision indexing, positioning, and locking applications in industrial and mechanical assemblies. The unit threads into a tapped hole using a 1\/4-20 thread and deploys a spring-loaded plunger that engages a mating detent or recess to hold a component in position. The pull ring allows the operator to retract the plunger manually without tools. With an initial end force of 0.5 pounds and a final end force of 2 pounds, this plunger suits light-duty positioning tasks where repeatable, tool-free engagement is required. Installers and maintenance technicians encounter this type of hardware in jigs, fixtures, slides, and adjustable assemblies.\u003c\/p\u003e\n\u003cp\u003eThe PRSN250P is suited for use in precision mechanical assemblies across manufacturing, tooling, and equipment maintenance environments. The 1\/4-20 thread makes it compatible with standard tapped holes in steel, aluminum, and similar substrates. It is a non-locking plunger, meaning the spring force alone provides retention without a secondary locking mechanism. This makes it appropriate for applications requiring quick, repeated adjustment rather than permanent or high-load retention. The pull ring enables single-hand plunger retraction, which is useful in confined or frequently accessed assemblies.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003ePull ring design allows tool-free manual plunger retraction\u003c\/li\u003e\n  \u003cli\u003eNon-locking plunger type for quick-release, repeated-adjustment applications\u003c\/li\u003e\n  \u003cli\u003e1\/4-20 thread for installation into standard tapped holes\u003c\/li\u003e\n  \u003cli\u003eSteel construction for durability in industrial environments\u003c\/li\u003e\n  \u003cli\u003eInitial end force of 0.5 pounds, final end force of 2 pounds for light-duty positioning\u003c\/li\u003e\n  \u003cli\u003eLocking element present for secure thread engagement in the body\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-fit spring plunger for mechanical assemblies using a standard 1\/4-20 tapped hole.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by threading the PRSN250P into a pre-tapped 1\/4-20 hole using a hex wrench sized for the 0.25-inch hex drive on the head. Ensure the mating assembly is powered down or de-energized and all moving components are secured before servicing plunger hardware. Do not over-torque the body, as this can damage the thread or affect plunger travel. Verify plunger projection and detent depth alignment before returning the assembly to service.\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\u003eThread Length\u003c\/strong\u003e: 0.31 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 0.31 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.44 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.18 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Diameter\u003c\/strong\u003e: 0.16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 0.62 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.19 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRing Diameter\u003c\/strong\u003e: 0.62 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 0.25 inches\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: 2 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Non-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: PRSN250P\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52082938216754,"sku":"PRSN250P","price":21.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e1d4b061ea3f558a6298453699d5f576.jpg?v=1790057182","url":"https:\/\/voomisupply.com\/products\/vlier-prsn250p-pull-ring-plunger-1-4-20-steel","provider":"Voomi Supply","version":"1.0","type":"link"}