{"product_id":"vlier-pr375-locking-pull-ring-plunger-3-8-16-steel","title":"Vlier PR375 Locking Pull Ring Plunger 3\/8-16 Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER PR375 is a steel locking pull ring plunger designed for precision indexing and positioning applications in mechanical assemblies. The plunger features a 3\/8-16 thread with a 1.2-inch thread length and a 0.233-inch plunger diameter, delivering an initial end force of 2 pounds and a final end force of 4 pounds. The pull ring lock mechanism holds the plunger in the retracted position until manually released, preventing unintended engagement during machine operation or assembly procedures. This type of component is typically installed by machinists, tool and die technicians, or mechanical assembly professionals working with jigs, fixtures, and positioning equipment.\u003c\/p\u003e\u003cp\u003eThe VLIER PR375 is suited for use in industrial fixtures, tooling plates, machine guarding assemblies, and precision positioning systems where controlled plunger engagement is required. The locking pull ring design is particularly well-suited for applications that demand repeatable manual actuation without the risk of accidental plunger extension. The 3\/8-16 thread makes it compatible with standard tapped holes found in steel and aluminum tooling components.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eLocking pull ring holds plunger retracted until manually released\u003c\/li\u003e\n\u003cli\u003e3\/8-16 thread size for compatibility with standard tapped tooling holes\u003c\/li\u003e\n\u003cli\u003eInitial end force of 2 pounds, final end force of 4 pounds for controlled engagement\u003c\/li\u003e\n\u003cli\u003eSteel construction for durability in industrial environments\u003c\/li\u003e\n\u003cli\u003e0.233-inch plunger diameter with 0.375-inch plunger projection\u003c\/li\u003e\n\u003cli\u003eCompact 1.68-inch body length suitable for space-constrained assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit component for mechanical fixtures and positioning assemblies using 3\/8-16 tapped mounting holes.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by threading the PR375 into a 3\/8-16 tapped hole to the specified thread engagement depth. Ensure the mating hole is clean and free of debris before installation. Use appropriate hand tools and avoid overtightening, which can damage the plunger housing or thread engagement. Always de-energize or lock out any machinery before servicing plunger components in automated or powered assemblies.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 1.2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Diameter\u003c\/strong\u003e: 0.233 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.375 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 1.68 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1.68 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head\u003c\/strong\u003e: 1.2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.48 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Diameter\u003c\/strong\u003e: 0.98 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 2 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 4 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Locking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: PR375\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52065845903666,"sku":"PR375","price":25.61,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/027fc3ec1e05e2dd18cf43e2a0853bf8_9c8c2875-bb5c-43ad-8ec0-d9bb114bbc6f.jpg?v=1790045136","url":"https:\/\/voomisupply.com\/products\/vlier-pr375-locking-pull-ring-plunger-3-8-16-steel","provider":"Voomi Supply","version":"1.0","type":"link"}