{"product_id":"vlier-nns57n-threaded-spring-plunger-5-16-18-1-in-steel","title":"Vlier NNS57N Threaded Spring Plunger 5\/16-18 1 in Steel","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe VLIER NNS57N is a threaded spring plunger designed for use in positioning, indexing, and light-duty locking applications across industrial and mechanical assemblies. The plunger features a 5\/16-18 thread with a 1 inch thread length and a standard-length steel body measuring 1 inch. The Delrin nose provides a low-friction, non-marring contact point, while the integrated locking element secures the plunger in position after installation. Initial end force is 1.5 pounds and final end force is 4.5 pounds. Plunger projection is 3\/16 inches with a maximum plunger diameter of 0.135 inches. Licensed technicians and precision assembly mechanics handle installation in most production and maintenance environments.\u003c\/p\u003e\u003cp\u003eThis plunger is suited for machine tool fixtures, jigs, tooling plates, and mechanical assemblies requiring consistent, repeatable spring-loaded positioning. The locking element holds the plunger body firmly in the threaded bore, preventing back-out under vibration or repeated cycling. The Delrin nose makes this version appropriate for applications where metal-to-metal contact is undesirable, such as locating against finished surfaces or softer substrates. It is used in both OEM production builds and field maintenance of industrial equipment.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e5\/16-18 thread with 1 inch thread length for standard tapped-hole installation\u003c\/li\u003e\n\u003cli\u003eSteel body provides durability in industrial and tooling environments\u003c\/li\u003e\n\u003cli\u003eDelrin nose delivers low-friction, non-marring plunger contact\u003c\/li\u003e\n\u003cli\u003eLocking element prevents back-out under vibration or repeated load cycles\u003c\/li\u003e\n\u003cli\u003e1.5 pound initial end force and 4.5 pound final end force for controlled engagement\u003c\/li\u003e\n\u003cli\u003e3\/16 inch plunger projection suits shallow-pocket indexing applications\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 fixtures, jigs, tooling plates, and mechanical assemblies using a standard 5\/16-18 tapped bore.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation is performed using a hex wrench or spanner tool sized to the body drive feature; power down or de-energize any associated machinery before servicing. The locking element is engaged by tightening the plunger body to the appropriate snug-fit torque in the tapped hole  -  do not overtighten, as this can deform the locking element. Confirm plunger projection and end force are appropriate for the detent or indexing load before final assembly. General mechanical assembly practices and applicable facility safety procedures apply.\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\u003eBody Material\u003c\/strong\u003e: Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNose Material\u003c\/strong\u003e: Delrin\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 3\/16 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.135 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMinimum Plunger Diameter\u003c\/strong\u003e: 0.133 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\u003eFinal End Force\u003c\/strong\u003e: 4.5 pounds\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: NNS57N\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51994466353458,"sku":"NNS57N","price":16.52,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/b7f39b487e35d05a021c00c7f4e9704a_49f5ebc1-7bbb-4a4d-8838-f3ee860f6674.jpg?v=1789991935","url":"https:\/\/voomisupply.com\/products\/vlier-nns57n-threaded-spring-plunger-5-16-18-1-in-steel","provider":"Voomi Supply","version":"1.0","type":"link"}