{"product_id":"vlier-h55n-threaded-spring-plunger-1-4-20-steel-locking","title":"Vlier H55N Threaded Spring Plunger 1\/4-20 Steel Locking","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER H55N is a threaded spring plunger designed for 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 3\/16 inch plunger projection. The steel body and steel nose provide durability in standard industrial environments. A built-in locking element secures the plunger in the threaded bore after installation, preventing loosening from vibration or repeated actuation. Initial end force is 1 pound, with a final end force of 4 pounds, making it suitable for low-to-moderate detent force requirements. Machinists, toolmakers, and mechanical assembly technicians are the primary installers.\u003c\/p\u003e\n\u003cp\u003eThe H55N is used in jigs, fixtures, machine tool components, and precision mechanical assemblies where repeatable part positioning or detent action is required. It threads directly into a tapped hole and applies controlled spring force through the nose to hold or index a mating component. The compact 1 inch body length allows installation in tight-clearance assemblies. This plunger suits both prototype and production applications across general manufacturing and industrial tooling environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e1\/4-20 thread size with 1 inch thread length for standard tapped-hole installation\u003c\/li\u003e\n  \u003cli\u003e3\/16 inch plunger projection provides controlled nose travel for detent engagement\u003c\/li\u003e\n  \u003cli\u003eSteel body and steel nose construction for durability in industrial use\u003c\/li\u003e\n  \u003cli\u003eLocking element secures plunger in bore and resists loosening from vibration\u003c\/li\u003e\n  \u003cli\u003e1 pound initial end force and 4 pound final end force for light-duty indexing applications\u003c\/li\u003e\n  \u003cli\u003e1\/8 inch hex size allows installation and adjustment with standard hex key tooling\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style threaded spring plunger for installation in any mechanical assembly with a 1\/4-20 tapped bore requiring standard spring plunger detent or positioning function.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or mechanical assembly technicians using a 1\/8 inch hex key. The mating bore must be tapped to 1\/4-20 prior to installation. Ensure the bore is clean and free of debris before threading in the plunger. The locking element engages the bore threads as the plunger is tightened  -  do not over-torque, as this can deform the locking element or damage the thread.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\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\u003eInitial End Force\u003c\/strong\u003e: 1 pound\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMiddle End Force\u003c\/strong\u003e: 2.5 pounds\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: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNose Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNose Radius\u003c\/strong\u003e: 0.0710 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 1\/8 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length Type\u003c\/strong\u003e: Standard\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\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: H55N\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51986598691122,"sku":"H55N","price":15.26,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/e1889fadcdcb2c9608056ac5a25cb90c.jpg?v=1789986299","url":"https:\/\/voomisupply.com\/products\/vlier-h55n-threaded-spring-plunger-1-4-20-steel-locking","provider":"Voomi Supply","version":"1.0","type":"link"}