{"product_id":"vlier-sprtl375-locking-knob-handle-plunger-3-8-16","title":"Vlier SPRTL375 Locking Knob Handle Plunger 3\/8-16","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe VLIER SPRTL375 is a locking knob handle plunger designed for precision positioning and indexing applications in mechanical assemblies. It features a 3\/8-16 thread size and a maximum plunger diameter of 0.25 inches. The initial end force is 0.25 pounds, ramping to a final end force of 2 pounds, providing positive engagement under load. The body is stainless steel with a black finish and a Delrin knob, making it suitable for environments where corrosion resistance and manual adjustability are required. Machinists, toolmakers, and mechanical assembly technicians are the primary installers of this component.\u003c\/p\u003e\n\u003cp\u003eThis locking plunger is used in jigs, fixtures, machine tool components, and positioning assemblies where a manually adjustable, lockable plunger point is needed. The locking knob style allows the plunger to be set and held in position without backing out under vibration or repeated actuation. It is suited for light-duty industrial applications in both production and maintenance environments where reliable, repeatable part location is critical.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking plunger type holds position under vibration and repeated use\u003c\/li\u003e\n  \u003cli\u003e3\/8-16 thread for standard tap compatibility in steel, aluminum, and plastic fixtures\u003c\/li\u003e\n  \u003cli\u003eDelrin knob provides comfortable hand torque without tooling\u003c\/li\u003e\n  \u003cli\u003eStainless steel body with black finish for corrosion resistance\u003c\/li\u003e\n  \u003cli\u003eInitial end force of 0.25 pounds rising to 2 pounds final end force for positive engagement\u003c\/li\u003e\n  \u003cli\u003eCompact 0.94 inch body length fits tight assembly envelopes\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as an OEM-style replacement or direct-fit component for mechanical fixtures and assemblies using standard 3\/8-16 threaded locking plunger positions.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstall into a tapped 3\/8-16 hole using hand torque on the Delrin knob. Ensure the mating bore or receiver hole is clean and free of debris before inserting the plunger. Disengage the locking mechanism before adjusting plunger depth, and verify full locking engagement before returning the assembly to service. No special tooling is required for standard installation.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 3\/8-16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 1.4 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.18 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Length\u003c\/strong\u003e: 0.94 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\/Shoulder\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead and Shoulder Height\u003c\/strong\u003e: 0.65 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHex Size\u003c\/strong\u003e: 3\/8 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 0.25 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 2 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Type\u003c\/strong\u003e: Locking\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKnob Style\u003c\/strong\u003e: Delrin\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial\u003c\/strong\u003e: Stainless Steel\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinish\u003c\/strong\u003e: Black\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: SPRTL375\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"VLIER","offers":[{"title":"Default Title","offer_id":51974076858674,"sku":"SPRTL375","price":35.02,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/92babc60882fe14aea7a1322b6a9e3e6_bfa05bbc-bceb-4f96-b1d1-d93746a53e22.jpg?v=1789975727","url":"https:\/\/voomisupply.com\/products\/vlier-sprtl375-locking-knob-handle-plunger-3-8-16","provider":"Voomi Supply","version":"1.0","type":"link"}