{"product_id":"vlier-sprt250p-knob-handle-spring-plunger-1-4-20","title":"Vlier SPRT250P Knob Handle Spring Plunger 1\/4-20","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER SPRT250P is a knob handle spring plunger designed for indexing, positioning, and light-duty holding applications in mechanical assemblies. This non-locking plunger features a Delrin knob for easy manual actuation without tools. It installs into a 1\/4-20 threaded bore and delivers an initial end force of 0.12 pounds, ramping up to a final end force of 0.36 pounds at full plunger depression. The body length measures 0.63 inches, with a plunger projection of 0.13 inches and a maximum plunger diameter of 0.16 inches. Machinists, tool and die makers, and mechanical assembly technicians are the typical installers for this type of hardware.\u003c\/p\u003e\n\u003cp\u003eThe SPRT250P is suited for use in fixtures, jigs, tooling plates, and light mechanical assemblies where repeatable manual positioning is required. The non-locking design allows the plunger to retract freely under load, making it appropriate for detent or locate-and-release functions. It is installed in standard 1\/4-20 threaded housings in both ferrous and non-ferrous components across industrial and manufacturing environments.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eNon-locking plunger type allows free retraction under applied load\u003c\/li\u003e\n  \u003cli\u003eDelrin knob handle enables tool-free manual actuation\u003c\/li\u003e\n  \u003cli\u003eInitial end force of 0.12 pounds, final end force of 0.36 pounds for light-duty detent applications\u003c\/li\u003e\n  \u003cli\u003eCompact body length of 0.63 inches suits tight-clearance installations\u003c\/li\u003e\n  \u003cli\u003ePlunger projection of 0.13 inches with a maximum plunger diameter of 0.16 inches\u003c\/li\u003e\n  \u003cli\u003eLocking element included for secure thread engagement in the bore\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style spring plunger for standard 1\/4-20 threaded bores in mechanical fixtures, jigs, tooling plates, and general industrial assemblies.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or mechanical assembly technicians using standard hand tools. Ensure the threaded bore is clean and properly tapped to 1\/4-20 before installation. Torque the plunger body into the housing until the locking element engages securely. Do not over-tighten, as this may damage the Delrin knob or distort the plunger mechanism.\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\u003ePlunger Type\u003c\/strong\u003e: Non-Locking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob Style\u003c\/strong\u003e: Delrin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 0.12 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 0.36 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.16 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.13 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 0.97 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.63 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\/Shoulder\u003c\/strong\u003e: 0.50 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.50 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead and Shoulder Height\u003c\/strong\u003e: 0.47 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 1\/4 inch\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: Yes\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: SPRT250P\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":52022187589938,"sku":"SPRT250P","price":26.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/fe63eb818a2011286e2fcb26b0e7e7da.jpg?v=1790013040","url":"https:\/\/voomisupply.com\/products\/vlier-sprt250p-knob-handle-spring-plunger-1-4-20","provider":"Voomi Supply","version":"1.0","type":"link"}