{"product_id":"vlier-h57n-threaded-spring-plunger-5-16-18-steel","title":"Vlier H57N Threaded Spring Plunger 5\/16-18 Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER H57N is a threaded spring plunger designed to provide controlled positioning and detent force in mechanical assemblies. Featuring a 5\/16-18 thread size with a 1 inch thread length and a 3\/16 inch nose projection, this plunger delivers an initial end force of 1.5 pounds and a final end force of 4.5 pounds with a middle end force of 3 pounds. The body and nose are both constructed from steel, providing durability in demanding industrial and mechanical applications. A locking element is incorporated into the design to secure the plunger's position once installed, preventing loosening under vibration or repeated cycling.\u003c\/p\u003e\u003cp\u003eThe H57N is suited for use in jigs, fixtures, tooling, machine components, and precision positioning assemblies where repeatable detent action is required. The standard plunger length configuration and compact 1\/8 inch hex drive make it practical for installations in tight spaces. This part is typically installed by machinists, toolmakers, maintenance technicians, and mechanical assemblers working with production equipment, fixtures, or automated machinery.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e5\/16-18 thread size with 1 inch thread length for secure installation in standard tapped holes\u003c\/li\u003e\n\u003cli\u003e3\/16 inch nose projection provides consistent detent engagement depth\u003c\/li\u003e\n\u003cli\u003eInitial end force of 1.5 lb and final end force of 4.5 lb for controlled positioning resistance\u003c\/li\u003e\n\u003cli\u003eSteel body and steel nose construction for strength and wear resistance\u003c\/li\u003e\n\u003cli\u003eIntegrated locking element prevents backing out under vibration\u003c\/li\u003e\n\u003cli\u003e1\/8 inch hex drive allows installation and adjustment with standard hex key tooling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-install threaded spring plunger for mechanical assemblies, jigs, fixtures, and positioning applications requiring a 5\/16-18 threaded body with standard plunger length configuration.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed by threading the H57N into a properly tapped 5\/16-18 hole using a 1\/8 inch hex key. De-energize and lock out any equipment before installing or servicing plungers in live machinery. The locking element should be engaged after final positioning to prevent rotation during operation. Do not overtighten, as excessive torque can deform the locking element or restrict plunger travel.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 5\/16-18\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\u003eNose Radius\u003c\/strong\u003e: 0.071 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 1.5 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMiddle End Force\u003c\/strong\u003e: 3.0 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 4.5 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\u003eHex Size\u003c\/strong\u003e: 1\/8 inch\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: H57N\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":67915881218354,"sku":"H57N","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/11ad58eb1715e33b849c06fdff6aa927.jpg?v=1791254933","url":"https:\/\/voomisupply.com\/products\/vlier-h57n-threaded-spring-plunger-5-16-18-steel","provider":"Voomi Supply","version":"1.0","type":"link"}