{"product_id":"vlier-fr250-locking-l-handle-spring-plunger-1-4-20-steel","title":"Vlier FR250 Locking L Handle Spring Plunger 1\/4-20 Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER FR250 is a locking L handle spring plunger designed for indexing, positioning, and light-duty retention applications in mechanical assemblies. It features a 1\/4-20 thread size with a 0.8 inch thread length and a 0.16 inch plunger diameter. The spring delivers 0.5 pounds initial end force rising to 2.5 pounds final end force, providing repeatable, controlled engagement. The body is 1.25 inches long with a 0.8 inch length under head and a 0.38 inch plunger projection. The steel construction makes it well-suited for production tooling, fixtures, and machine components where reliable spring-loaded retention is required.\u003c\/p\u003e\u003cp\u003eThe FR250 is used in industrial and manufacturing environments where a threaded spring plunger must be installed into a tapped hole and locked in position. The L handle allows for tool-free adjustment and removal. Typical applications include jigs, fixtures, assembly tooling, and mechanical positioning systems where controlled spring force and locking capability are needed. The plunger can be installed by hand or with a hex wrench using the 0.25 inch hex size.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-20 thread size with 0.8 inch thread length for standard tapped-hole installation\u003c\/li\u003e\n\u003cli\u003eLocking L handle design allows tool-free positioning and removal without a wrench\u003c\/li\u003e\n\u003cli\u003e0.5 to 2.5 pounds end force range provides light, consistent spring-loaded engagement\u003c\/li\u003e\n\u003cli\u003e0.38 inch plunger projection suitable for shallow-detent indexing applications\u003c\/li\u003e\n\u003cli\u003eSteel handle construction for durability in production and tooling environments\u003c\/li\u003e\n\u003cli\u003e0.25 inch hex size accommodates standard hex wrench for torquing into place\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard threaded spring plunger for installation in any component or assembly with a matching 1\/4-20 tapped hole requiring locking L handle access and spring-loaded plunger retention.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by threading the FR250 directly into a 1\/4-20 tapped hole by hand or with a 0.25 inch hex wrench. Ensure the mating assembly is de-energized and stationary before installing or removing the plunger. Do not overtighten, as excessive torque may damage the thread or affect spring performance. Follow applicable machine safety and lockout\/tagout procedures before servicing any assembly that uses this component.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\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: 0.8 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\u003c\/strong\u003e: 0.8 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: 1.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.38 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: 2.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Locking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Length\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Diameter\u003c\/strong\u003e: 0.09 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHandle Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.45 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 0.25 inches\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: FR250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51990712156466,"sku":"FR250","price":24.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/1f317480fa83327172a647448de6427c.jpg?v=1789989132","url":"https:\/\/voomisupply.com\/products\/vlier-fr250-locking-l-handle-spring-plunger-1-4-20-steel","provider":"Voomi Supply","version":"1.0","type":"link"}