{"product_id":"vlier-ssph54an-threaded-spring-plunger-1-4-28-ss","title":"Vlier SSPH54AN Threaded Spring Plunger 1\/4-28 Ss","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER SSPH54AN is a threaded spring plunger designed for precision positioning, indexing, and light-duty holding applications in industrial assemblies. Built with a stainless steel body and stainless steel nose, this standard-length plunger features a 1\/4-28 thread and a 1 inch thread length for secure installation in threaded bores. The locking element prevents the plunger from backing out under vibration or repeated cycling. Initial end force is 3 pounds, middle end force is 8 pounds, and final end force is 13 pounds, giving installers a predictable force progression across the full travel range.\u003c\/p\u003e\u003cp\u003eThis spring plunger is suited for use in machine tooling fixtures, jigs, automated assembly equipment, and precision mechanical components where controlled detent force and repeatable positioning are required. It is typically installed by machinists, tool and die makers, and mechanical assembly technicians in both light manufacturing and precision industrial environments.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eStainless steel body and nose for corrosion resistance in demanding environments\u003c\/li\u003e\n\u003cli\u003eLocking element prevents back-out under vibration and repeated load cycles\u003c\/li\u003e\n\u003cli\u003e1\/4-28 thread with 1 inch thread length for broad fixture compatibility\u003c\/li\u003e\n\u003cli\u003ePlunger projection of 3\/16 inch for controlled detent engagement depth\u003c\/li\u003e\n\u003cli\u003eProgressive force range: 3 pounds initial, 8 pounds middle, 13 pounds final end force\u003c\/li\u003e\n\u003cli\u003eStandard plunger length type for drop-in replacement in existing threaded bores\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a direct-fit threaded spring plunger for applications requiring a 1\/4-28 threaded bore and a standard-length stainless steel plunger body with a locking element feature.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by threading the plunger into a prepared 1\/4-28 tapped bore using the hex drive feature; a hex key or ball-end driver of the appropriate size is required. Disengage or lock out any powered or spring-loaded mechanisms in the assembly before installing or removing the plunger. Do not over-torque the body, as this can damage the locking element or distort the bore threads. Verify plunger projection clearance against mating components before finalizing the installation.\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 Length Type\u003c\/strong\u003e: Standard\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\u003eHex Size\u003c\/strong\u003e: 0.079 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMiddle End Force\u003c\/strong\u003e: 8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 13 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\u003eLocking Element\u003c\/strong\u003e: Yes\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: SSPH54AN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52092364194098,"sku":"SSPH54AN","price":19.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6ffe0e870bd4ef2be590539fc196a090_51e3a01f-ad5c-42f8-8086-7f3a7bdf2222.jpg?v=1790063777","url":"https:\/\/voomisupply.com\/products\/vlier-ssph54an-threaded-spring-plunger-1-4-28-ss","provider":"Voomi Supply","version":"1.0","type":"link"}