{"product_id":"vlier-sl250-knob-handle-spring-plunger-1-4-20","title":"Vlier SL250 Knob Handle Spring Plunger 1\/4-20","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER SL250 is a knurled-knob handle spring plunger used to index, locate, or retain machine components through spring-loaded ball or nose engagement. Threaded at 1\/4-20 with a 0.5 inch thread length, this non-locking plunger delivers 1 pound of initial end force and 4 pounds of final end force, making it well suited for light-duty positioning and detent applications. The plunger body is steel with a zinc gold chromate finish that provides corrosion resistance in shop and industrial environments. The knurled knob allows hand adjustment without tools. Machinists, toolmakers, and mechanical maintenance technicians are the typical installers.\u003c\/p\u003e\n\u003cp\u003eThe SL250 fits applications where a hand-adjustable, threaded spring plunger is required in a tapped hole. Common uses include fixture and jig locating, panel or door retention, machine guarding latches, and indexing plates. The compact body length of 0.79 inches keeps the installed footprint low, and the 0.125 inch plunger projection allows reliable engagement with shallow detent recesses. This plunger is appropriate for both original equipment and maintenance replacement scenarios in general industrial, tooling, and light manufacturing settings.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 thread size with 0.5 inch thread length for standard tapped hole installation\u003c\/li\u003e\n  \u003cli\u003eNon-locking plunger design with 1 pound initial and 4 pound final end force\u003c\/li\u003e\n  \u003cli\u003eKnurled knob handle allows hand adjustment and removal without tools\u003c\/li\u003e\n  \u003cli\u003eMaximum plunger diameter of 0.123 inches with a tolerance of +0.001 \/ -0.000 inches\u003c\/li\u003e\n  \u003cli\u003eSteel construction with zinc gold chromate finish for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eCompact 0.79 inch body length suits space-constrained assemblies\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or new-installation spring plunger for any machine, fixture, or assembly with a 1\/4-20 tapped hole requiring a non-locking, knob-handle spring plunger.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation requires a properly tapped 1\/4-20 through or blind hole in the mating component. Thread the plunger in by hand using the knurled knob, then verify plunger projection and spring engagement before final seating. De-energize or lock out any powered equipment before installing or replacing spring plungers in live machinery. Follow applicable machine-guarding and tooling standards for your facility.\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: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 4 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.123 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Diameter Tolerance\u003c\/strong\u003e: +0.001 \/ -0.000 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 0.813 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.79 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\/Shoulder\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.5 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.19 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead and Shoulder Height\u003c\/strong\u003e: 0.313 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Non-Locking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob Style\u003c\/strong\u003e: Knurled\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: No\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: Zinc Gold Chromate\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: SL250\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":68081962582322,"sku":"SL250","price":19.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/7061010dc5a987ee2eb7d6f99ef7b7d0.jpg?v=1793149507","url":"https:\/\/voomisupply.com\/products\/vlier-sl250-knob-handle-spring-plunger-1-4-20","provider":"Voomi Supply","version":"1.0","type":"link"}