{"product_id":"vlier-sss55a-threaded-spring-plunger-1-4-28-stainless-steel","title":"Vlier SSS55A Threaded Spring Plunger 1\/4-28 Stainless Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER SSS55A is a threaded spring plunger designed for precise, repeatable positioning and indexing applications in industrial and mechanical assemblies. Built with a stainless steel body and stainless steel nose, it threads into a tapped hole using a 1\/4-28 thread and delivers controlled spring force through its projecting plunger tip. Initial end force is 1 pound, with a final end force of 4 pounds. The plunger diameter ranges from 0.117 to 0.118 inches with a 3\/16 inch projection. This part is installed by machine builders, tool and die technicians, and maintenance machinists working on jigs, fixtures, and precision assemblies.\u003c\/p\u003e\u003cp\u003eThe SSS55A suits applications where repeatable detent action, light spring-loaded engagement, or component retention is needed without a locking element. It fits into any assembly accepting a 1\/4-28 threaded hole with sufficient clearance for the 3\/16 inch plunger projection. Common use cases include fixture plates, indexing mechanisms, sliding carriages, and panel assemblies in both light manufacturing and precision tooling environments. The all-stainless construction makes it appropriate for washdown-adjacent or corrosion-sensitive settings.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-28 thread for direct installation into standard tapped holes\u003c\/li\u003e\n\u003cli\u003eStainless steel body and nose for corrosion resistance\u003c\/li\u003e\n\u003cli\u003e1 pound initial end force and 4 pound final end force for light detent engagement\u003c\/li\u003e\n\u003cli\u003e3\/16 inch plunger projection with 0.117 to 0.118 inch plunger diameter\u003c\/li\u003e\n\u003cli\u003eStandard plunger length type with 1 inch body and thread length\u003c\/li\u003e\n\u003cli\u003eNo locking element  -  thread engagement relies on installation torque\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or new-installation threaded spring plunger for any assembly requiring a 1\/4-28 threaded spring plunger with a standard 1 inch thread length and 3\/16 inch projection.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by machinists or maintenance technicians using a hex key or appropriate drive tool suited to the plunger body. The receiving hole must be tapped to 1\/4-28 before installation. Always ensure the assembly is de-energized and secured before servicing spring plungers in live machinery. Because this plunger has no locking element, apply appropriate thread-locking compound or torque to the manufacturer specification to prevent loosening under vibration.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28\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: Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Material\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Length Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: None\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: SSS55A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52117520941362,"sku":"SSS55A","price":18.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/66a4e7a93a680a485853722e191faaf0_3d658612-88df-44b4-b18d-5562199d4a66.jpg?v=1790081561","url":"https:\/\/voomisupply.com\/products\/vlier-sss55a-threaded-spring-plunger-1-4-28-stainless-steel","provider":"Voomi Supply","version":"1.0","type":"link"}