{"product_id":"vlier-ph54an-threaded-spring-plunger-1-4-28-steel","title":"Vlier PH54AN Threaded Spring Plunger 1\/4-28 Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER PH54AN is a threaded spring plunger designed for indexing, positioning, and light-duty detent applications in mechanical assemblies. Machined with a steel body and steel nose, this plunger threads into a tapped hole to provide repeatable spring-loaded pressure against a mating surface or detent recess. It features a locking element to secure it in place once adjusted, preventing loosening from vibration or normal service loads. The 1\/4-28 thread and 1-inch thread length suit a wide range of standard tapped fixtures. Initial end force is 3 pounds, middle end force is 8 pounds, and final end force is 13 pounds, giving installers a predictable force progression across plunger travel.\u003c\/p\u003e\u003cp\u003eThis plunger is used in machine tool fixtures, jigs, assembly tooling, indexing mechanisms, and general industrial equipment where a spring-loaded locating or holding force is required. The standard plunger length type and 3\/16-inch projection make it well suited for applications requiring a compact, low-profile engagement. Maintenance technicians and machine builders install this type of component during tooling setup, fixture assembly, or equipment overhaul. Both light manufacturing and precision mechanical assembly environments are common install contexts.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e1\/4-28 unified fine thread for secure, precise installation in standard tapped holes\u003c\/li\u003e\n\u003cli\u003eLocking element prevents rotation and back-out under vibration or load\u003c\/li\u003e\n\u003cli\u003eSteel body and steel nose for durability in industrial environments\u003c\/li\u003e\n\u003cli\u003e3-pound initial end force and 13-pound final end force for predictable detent action\u003c\/li\u003e\n\u003cli\u003e3\/16-inch plunger projection provides compact engagement depth\u003c\/li\u003e\n\u003cli\u003eHex drive (0.079 inches across flats) allows installation with a standard hex key\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or direct-install spring plunger for mechanical fixtures and assemblies using a 1\/4-28 tapped hole with a 1-inch minimum thread engagement depth.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is typically performed by machine builders, toolmakers, or maintenance technicians using a hex key sized to the 0.079-inch hex drive. Thread the plunger into a clean, properly tapped 1\/4-28 hole and tighten until the locking element engages to resist back-out. Verify plunger travel and projection clearance before final assembly. Do not overtighten, as doing so may damage the locking element or restrict plunger movement.\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: 0.117 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: 3 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMiddle End Force\u003c\/strong\u003e: 8 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 13 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 0.079 inches\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\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: PH54AN\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52082768871730,"sku":"PH54AN","price":15.76,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/6ffe0e870bd4ef2be590539fc196a090_2fda8870-3706-425c-86ac-f5d82edaeef2.jpg?v=1790057077","url":"https:\/\/voomisupply.com\/products\/vlier-ph54an-threaded-spring-plunger-1-4-28-steel","provider":"Voomi Supply","version":"1.0","type":"link"}