{"product_id":"vlier-ssmd55n-threaded-spring-plunger-1-4-20-stainless-steel","title":"Vlier SSMD55N Threaded Spring Plunger 1\/4-20 Stainless Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER SSMD55N is a stubby threaded spring plunger designed for precise, repeatable positioning and light-duty indexing applications in mechanical assemblies. The body is manufactured from stainless steel, and the nose is Delrin for low-friction contact against mating surfaces. Thread size is 1\/4-20 with a body and thread length of 0.531 inches. The plunger diameter measures 0.119 inches with a projection of 0.078 inches. Initial end force is 1 pound and final end force is 3.5 pounds. A locking element is incorporated into the body to secure the plunger once it is set to the desired position. This part is installed by machinists, maintenance technicians, and mechanical assemblers.\u003c\/p\u003e\u003cp\u003eThe SSMD55N is suited for use in jigs, fixtures, tooling plates, machine assemblies, and similar precision mechanical setups where a compact, low-profile spring plunger is required. The stubby body length makes it a practical choice when thread engagement depth is limited. The stainless steel body offers corrosion resistance suitable for washdown or light chemical environments. The Delrin nose reduces marring on soft or finished mating surfaces.\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 minimizes surface damage on mating components\u003c\/li\u003e\n\u003cli\u003eLocking element secures plunger position after installation and adjustment\u003c\/li\u003e\n\u003cli\u003eStubby body profile fits shallow threaded holes and space-constrained assemblies\u003c\/li\u003e\n\u003cli\u003e1\/4-20 thread for broad compatibility with standard tapped hole patterns\u003c\/li\u003e\n\u003cli\u003e1 pound initial and 3.5 pound final end force for light-duty positioning\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-fit component for mechanical assemblies requiring a 1\/4-20 threaded spring plunger with a stubby body profile.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by hand or with a hex key or slotted driver, depending on the drive style of the plunger body. Ensure the mating tapped hole is clean and free of debris before threading in the plunger. The locking element should be engaged after the plunger is set to the correct projection depth. Do not overtighten, as stainless steel fasteners are susceptible to galling in threaded holes.\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: 0.531 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.531 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.078 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.119 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: 3.5 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: Stubby\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: SSMD55N\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51972024566066,"sku":"SSMD55N","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/f1b40d853c339b36dee2a8616f0051b9.jpg?v=1789961312","url":"https:\/\/voomisupply.com\/products\/vlier-ssmd55n-threaded-spring-plunger-1-4-20-stainless-steel","provider":"Voomi Supply","version":"1.0","type":"link"}