{"product_id":"vlier-s55n-threaded-spring-plunger-1-4-20-steel-locking","title":"Vlier S55N Threaded Spring Plunger 1\/4-20 Steel Locking","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER S55N is a standard threaded spring plunger designed to provide controlled, repeatable positioning force in mechanical assemblies, jigs, fixtures, and tooling applications. The S55N features a 1\/4-20 thread with a 1 inch thread length and a steel body, making it well suited for industrial environments that demand durability. The plunger nose is also steel, with a minimum diameter of 0.117 inches and a maximum of 0.118 inches. Initial end force is 1 pound, and final end force is 4 pounds, giving technicians a predictable engagement feel. A locking element is included to secure the plunger in its threaded bore once adjusted to the correct depth.\u003c\/p\u003e\u003cp\u003eThis spring plunger is commonly installed in machined holes and tapped bores in workholding fixtures, assembly jigs, tooling plates, and light mechanical indexing applications. The 3\/16 inch projection provides enough travel for positive part location or detent functions without excessive protrusion. It is appropriate for both OEM assembly and maintenance replacement situations where a standard 1\/4-20 threaded plunger with a locking feature is required. Machinists, tool-and-die technicians, and mechanical assemblers are the typical installers.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-20 thread size with 1 inch thread length for broad fixture compatibility\u003c\/li\u003e\n\u003cli\u003eSteel body and steel nose for durability in industrial environments\u003c\/li\u003e\n\u003cli\u003eLocking element secures plunger depth after adjustment\u003c\/li\u003e\n\u003cli\u003e1 pound initial end force and 4 pound final end force for predictable engagement\u003c\/li\u003e\n\u003cli\u003e3\/16 inch plunger projection in standard length configuration\u003c\/li\u003e\n\u003cli\u003ePlunger diameter range of 0.117 to 0.118 inches for precise fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-installation threaded spring plunger for any application requiring a standard 1\/4-20 threaded bore with a locking-style plunger element.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall into a properly tapped 1\/4-20 threaded bore using a hex key or flat-blade tool compatible with the plunger body drive feature. Ensure the mating bore is clean and free of debris before threading in the plunger. Engage the locking element only after the plunger has been adjusted to the correct projection depth. Always power down or de-energize any machine or fixture before servicing installed plungers.\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: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 1 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 3\/16 inch\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Plunger Diameter\u003c\/strong\u003e: 0.117 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.118 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\u003eBody Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Length Type\u003c\/strong\u003e: Standard\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: S55N\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51971424944434,"sku":"S55N","price":15.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3738d08f67e3ff1d847a69c5eabcbd70.jpg?v=1789957213","url":"https:\/\/voomisupply.com\/products\/vlier-s55n-threaded-spring-plunger-1-4-20-steel-locking","provider":"Voomi Supply","version":"1.0","type":"link"}