{"product_id":"vlier-s55a-threaded-spring-plunger-1-4-28-1-in-thread","title":"Vlier S55A Threaded Spring Plunger 1\/4-28 1 in Thread","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER S55A is a standard threaded spring plunger designed to provide controlled, spring-loaded positioning and retention in precision assemblies. Featuring a 1\/4-28 thread with a 1 inch thread length, the S55A delivers 1 pound of initial end force and 4 pounds of final end force through a steel nose and steel body. The plunger projection measures 3\/16 inch, with a plunger diameter ranging from 0.117 to 0.118 inches. This part is typically installed by machinists, toolmakers, and mechanical assembly technicians working in jigs, fixtures, indexing mechanisms, and positioning applications.\u003c\/p\u003e\n\u003cp\u003eThe S55A fits installations requiring a compact, fine-thread spring plunger in steel construction. Common applications include fixture plates, machine tool components, dial mechanisms, and precision indexing assemblies where repeatable low-to-moderate spring force is needed. The standard plunger length type makes this a straightforward drop-in choice for general-purpose positioning work in both production and toolroom environments. No locking element is present, which simplifies installation and removal in applications where adjustment is routine.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-28 fine thread for precise, low-clearance installation\u003c\/li\u003e\n  \u003cli\u003e1 inch thread length and 1 inch body length for consistent engagement depth\u003c\/li\u003e\n  \u003cli\u003e3\/16 inch plunger projection suitable for standard detent and positioning tasks\u003c\/li\u003e\n  \u003cli\u003e1 pound initial end force and 4 pound final end force for controlled spring resistance\u003c\/li\u003e\n  \u003cli\u003eSteel nose and steel body construction for durability in industrial environments\u003c\/li\u003e\n  \u003cli\u003eNo locking element  -  allows straightforward torque-in installation and future adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or standard installation component for fixtures, jigs, and mechanical assemblies requiring a 1\/4-28 threaded spring plunger with a standard plunger length configuration.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is typically performed by machinists or mechanical assembly technicians using a hex wrench or screwdriver appropriate for the body drive style. Ensure the mating threaded bore is clean and free of debris before threading in the plunger. Do not overtighten, as this can restrict plunger travel and reduce spring performance. Verify plunger projection and spring force requirements against the assembly specification before final installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/4-28\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\u003eNose Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Material\u003c\/strong\u003e: 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: No\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: S55A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52076715016498,"sku":"S55A","price":16.58,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/66a4e7a93a680a485853722e191faaf0_cd4fb8cb-7bf1-4c02-a882-97b4cf51e0c4.jpg?v=1790052854","url":"https:\/\/voomisupply.com\/products\/vlier-s55a-threaded-spring-plunger-1-4-28-1-in-thread","provider":"Voomi Supply","version":"1.0","type":"link"}