{"product_id":"vlier-m55n-threaded-spring-plunger-1-4-20-steel-locking","title":"Vlier M55N Threaded Spring Plunger 1\/4-20 Steel Locking","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER M55N is a stubby threaded spring plunger designed for applications requiring high end force in restricted space. Featuring a 1\/4-20 thread and a 0.531-inch thread length, this plunger delivers 1 pound of initial end force and 3.5 pounds of final end force. The plunger nose projects 0.078 inches and has a maximum diameter of 0.119 inches. Both the body and nose are constructed from steel, and the unit includes a locking element to secure the plunger in position once adjusted. Machinists, tool-and-die technicians, and mechanical assembly professionals install this component in precision fixtures and positioning equipment.\u003c\/p\u003e\u003cp\u003eThe M55N is suited for use in tight or space-constrained assemblies where a standard-length plunger will not fit. Its stubby profile makes it a practical choice for fixture plates, jig components, indexing mechanisms, and similar applications where accurate, repeatable positioning under load is required. The locking element makes it appropriate for installations where vibration or movement could otherwise shift the plunger setting.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eStubby plunger length type for use in restricted-space installations\u003c\/li\u003e\n\u003cli\u003e1\/4-20 thread with 0.531-inch thread length for standard tapped-hole installation\u003c\/li\u003e\n\u003cli\u003e1 pound initial end force and 3.5 pounds final end force for high-force positioning\u003c\/li\u003e\n\u003cli\u003eMaximum plunger diameter of 0.119 inches with 0.078-inch projection\u003c\/li\u003e\n\u003cli\u003eSteel body and steel nose for durability in industrial and tooling environments\u003c\/li\u003e\n\u003cli\u003eLocking element included to maintain adjustment under vibration or load\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 using a 1\/4-20 threaded spring plunger in restricted-space, high-end-force applications.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstall into a properly tapped 1\/4-20 through-hole or blind hole using an appropriate hex key or spanner tool. De-energize or lock out any machinery before servicing components in moving assemblies. Do not overtighten, as this can damage the locking element or distort the thread. Confirm plunger projection and end force are appropriate for the load requirements of the application before final 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: 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 Length Type\u003c\/strong\u003e: Stubby\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\u003ePlunger Projection\u003c\/strong\u003e: 0.078 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: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: High end force, restricted space\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: M55N\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51958255747378,"sku":"M55N","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/17691eacd57667f8c90ba7bba063b440.jpg?v=1789944967","url":"https:\/\/voomisupply.com\/products\/vlier-m55n-threaded-spring-plunger-1-4-20-steel-locking","provider":"Voomi Supply","version":"1.0","type":"link"}