{"product_id":"vlier-spr250p-locking-pull-ring-plunger-1-4-20-ss","title":"Vlier SPR250P Locking Pull Ring Plunger 1\/4-20 Ss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER SPR250P is a stainless steel locking pull ring plunger threaded at 1\/4-20 with a 0.8 inch thread length. It is designed for positional locking and indexing applications where a retractable, spring-loaded plunger must hold a position under load and release only when deliberately pulled. The plunger diameter is 0.155 inches, plunger projection is 0.25 inches, and end force ranges from 1 pound initial to 2.5 pounds final. Machinists, toolmakers, maintenance technicians, and equipment assemblers install this type of hardware in jigs, fixtures, panels, and mechanical assemblies requiring repeatable positioning.\u003c\/p\u003e\n\u003cp\u003eThis plunger is used in light-duty industrial and mechanical applications where controlled locking and positive retention are required. Common install scenarios include fixture plates, indexing jigs, drawer assemblies, enclosure panels, and equipment housings. The pull ring mechanism allows the operator to retract the plunger by hand without additional tooling, making it suitable for frequent adjustment cycles. It fits residential and commercial equipment assemblies where a threaded body plunger with a locking element is specified.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking pull ring design  -  plunger retracts only when ring is manually pulled, preventing accidental disengagement\u003c\/li\u003e\n  \u003cli\u003e1\/4-20 thread with 0.8 inch thread length for standard tapped hole installation\u003c\/li\u003e\n  \u003cli\u003eStainless steel construction for corrosion resistance in demanding service environments\u003c\/li\u003e\n  \u003cli\u003eEnd force rated from 1 pound initial to 2.5 pounds final for light-duty positioning loads\u003c\/li\u003e\n  \u003cli\u003eCompact body length of 1.14 inches suits space-constrained assemblies\u003c\/li\u003e\n  \u003cli\u003eIntegrated locking element provides positive retention until intentionally released\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct install component for mechanical assemblies, fixtures, and equipment panels requiring a 1\/4-20 threaded locking spring plunger with a pull ring release.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by threading the plunger body into a tapped 1\/4-20 hole to the specified thread engagement depth. De-energize or lock out any equipment before servicing assemblies that incorporate this plunger. A hex wrench or appropriate driver applied to the head is typically used for final torque; follow the equipment manufacturer's fastener specifications. Do not over-tighten, as this may damage the locking element or restrict 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\/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\u003ePlunger Type\u003c\/strong\u003e: Locking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Diameter\u003c\/strong\u003e: 0.155 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 1.14 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1.14 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\u003eHead Height\u003c\/strong\u003e: 0.34 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\u003eInitial End Force\u003c\/strong\u003e: 1 pound\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\u003eLocking Element\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Stainless 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: SPR250P\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52071734935858,"sku":"SPR250P","price":30.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/895059bcadd7ea72bab5473352f963c5.jpg?v=1790049309","url":"https:\/\/voomisupply.com\/products\/vlier-spr250p-locking-pull-ring-plunger-1-4-20-ss","provider":"Voomi Supply","version":"1.0","type":"link"}