{"product_id":"vlier-ssph54-threaded-spring-plunger-1-4-20-stainless-steel","title":"Vlier SSPH54 Threaded Spring Plunger 1\/4-20 Stainless Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER SSPH54 is a threaded spring plunger designed for precision positioning, indexing, and light-duty detent applications in mechanical assemblies. It features a 1\/4-20 thread with a 1 inch thread length and a stainless steel body and nose, making it suitable for environments where corrosion resistance matters. The plunger nose diameter ranges from 0.117 to 0.118 inches with a 3\/16 inch projection. Initial end force is 3 pounds, progressing through a middle end force of 8 pounds to a final end force of 13 pounds, giving a predictable force ramp for controlled engagement. Machinists, tool and die technicians, and mechanical assembly professionals install this type of component in fixtures, jigs, and precision equipment.\u003c\/p\u003e\u003cp\u003eThe SSPH54 is suited for use in tooling fixtures, machine tool components, production jigs, and general mechanical assemblies where repeatable spring-loaded positioning is required. The all-stainless steel construction makes it appropriate for washdown-prone or corrosive environments. It installs into a tapped 1\/4-20 through-hole or blind hole with standard threading. No locking element is incorporated, so torque and positioning are managed by thread engagement alone. The standard plunger length type means the 1 inch body length fits typical fixture plate thicknesses without custom machining.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-20 external thread with 1 inch thread length for standard tapped-hole installation\u003c\/li\u003e\n\u003cli\u003eStainless steel body and nose construction for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eProgressive end force: 3 pounds initial, 8 pounds middle, 13 pounds final\u003c\/li\u003e\n\u003cli\u003ePlunger nose diameter of 0.117 to 0.118 inches with 3\/16 inch projection\u003c\/li\u003e\n\u003cli\u003eNo locking element  -  adjustable by thread engagement depth\u003c\/li\u003e\n\u003cli\u003eHex drive at 0.079 inches for installation and torque adjustment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style or replacement threaded spring plunger for use in standard 1\/4-20 tapped holes in mechanical fixtures, jigs, and precision tooling assemblies.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eA licensed machinist or mechanical technician typically installs threaded spring plungers using the appropriate hex key to drive the plunger into a pre-tapped 1\/4-20 hole. De-energize or lock out any machine or assembly before servicing spring plungers in active tooling. Do not overtighten, as excessive torque can deform the plunger body or alter the force characteristics. Verify thread engagement depth matches the application load requirements before finalizing installation.\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: 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\u003eHex Size\u003c\/strong\u003e: 0.079 inches\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: None\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: SSPH54\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51960372855090,"sku":"SSPH54","price":16.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/4aa43b4c32ed020733de690c7b70ee1b.jpg?v=1789946306","url":"https:\/\/voomisupply.com\/products\/vlier-ssph54-threaded-spring-plunger-1-4-20-stainless-steel","provider":"Voomi Supply","version":"1.0","type":"link"}