{"product_id":"vlier-sssd55a-threaded-spring-plunger-1-4-28-stainless-steel","title":"Vlier SSSD55A Threaded Spring Plunger 1\/4-28 Stainless Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER SSSD55A is a threaded spring plunger designed for indexing, positioning, and light-duty holding applications in mechanical assemblies. The plunger body is machined from stainless steel with a Delrin nose, offering corrosion resistance and low-friction tip contact. It features a 1\/4-28 thread with a 1 inch thread length, a plunger diameter range of 0.116 to 0.118 inches, and a 3\/16 inch projection. Initial end force is 1 pound and final end force is 4 pounds. This part is installed by machinists, toolmakers, and mechanical assemblers in production and maintenance environments where repeatable spring-loaded positioning is required.\u003c\/p\u003e\u003cp\u003eThe SSSD55A is suited for use in jigs, fixtures, machine slides, and tooling plates where a threaded installation point is available. Its standard-length plunger configuration and fine 1\/4-28 thread pitch make it appropriate for applications requiring precise thread engagement in aluminum, steel, or plastic housings. The stainless steel body makes it a practical choice in environments with exposure to moisture or mild chemicals. No locking element is present, so the plunger is free to retract under load without secondary retention.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eStainless steel body for corrosion resistance in demanding environments\u003c\/li\u003e\n\u003cli\u003eDelrin nose material provides low-friction, non-marring tip contact\u003c\/li\u003e\n\u003cli\u003e1\/4-28 fine thread for precise installation and secure engagement\u003c\/li\u003e\n\u003cli\u003e1 pound initial end force and 4 pound final end force for light-duty positioning\u003c\/li\u003e\n\u003cli\u003e3\/16 inch plunger projection for consistent indexing depth\u003c\/li\u003e\n\u003cli\u003eNo locking element  -  free-retracting design for straightforward spring-loaded use\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a standard threaded spring plunger for use in jigs, fixtures, and mechanical assemblies requiring a 1\/4-28 threaded hole and a spring-loaded positioning element.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by threading the SSSD55A into a properly tapped 1\/4-28 hole using an appropriate wrench or driver on the body hex, if present, or with a suitable installation tool. Ensure the mating thread is clean and free of debris before installation. Do not overtighten, as this can preload or damage the internal spring mechanism. Verify plunger projection and end force requirements are confirmed against the application before final assembly.\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: 0.116 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: Delrin\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\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: SSSD55A\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52008927461682,"sku":"SSSD55A","price":17.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b7f39b487e35d05a021c00c7f4e9704a_fb033314-ca30-406c-8fe2-b40ad462af8e.jpg?v=1790002790","url":"https:\/\/voomisupply.com\/products\/vlier-sssd55a-threaded-spring-plunger-1-4-28-stainless-steel","provider":"Voomi Supply","version":"1.0","type":"link"}