{"product_id":"gibraltar-34246ss-locking-knob-plunger-3-8-16-thread","title":"Gibraltar 34246SS Locking Knob Plunger 3\/8-16 Thread","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GIBRALTAR 34246SS is a locking knob-style spring plunger with a knobless threaded stud design, intended for use in indexing, positioning, and light-duty clamping applications. It features a 3\/8-16 external thread with a 0.75 inch thread length and a maximum plunger diameter of 0.216 inches. The spring delivers an initial end force of 0.75 pounds, building to a final end force of 3 pounds, which makes it suitable for controlled retention and repeatable positioning in jigs, fixtures, and machine components. The integrated locking element locks the plunger in the retracted position when needed. Machinists, toolmakers, and mechanical assembly technicians are the primary installers of this hardware.\u003c\/p\u003e\n\u003cp\u003eThis plunger is commonly installed in machine tool fixtures, production jigs, enclosures, and industrial equipment panels where a positive-locking index point is required. The knobless threaded stud configuration allows it to be installed flush or recessed into a tapped bore, with a hex wrench or driver used to tighten it in place. The 31\/32 inch length under head and 7\/32 inch plunger projection determine the functional envelope for fitment in a given application. No external knob is present, keeping the installed profile low and snag-free.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking plunger design holds plunger retracted when locked, preventing unintended extension\u003c\/li\u003e\n  \u003cli\u003e3\/8-16 external thread with 0.75 inch thread length for standard tapped-bore installation\u003c\/li\u003e\n  \u003cli\u003eSpring end force range of 0.75 pounds initial to 3 pounds final for light-duty indexing retention\u003c\/li\u003e\n  \u003cli\u003eKnobless threaded stud style maintains a low installed profile in tight-clearance assemblies\u003c\/li\u003e\n  \u003cli\u003eMaximum plunger diameter of 0.216 inches with a +0.001 inch diameter tolerance\u003c\/li\u003e\n  \u003cli\u003eInternal stud thread size of 5\/16-18 for optional knob or driver attachment\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit replacement or new-installation locking spring plunger for standard 3\/8-16 tapped bores in machine fixtures, jigs, enclosures, and industrial positioning assemblies.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by threading the plunger body into a prepared 3\/8-16 tapped bore using a hex key or appropriate driver on the stud. Ensure the mating bore is clean and free of debris before installation. Apply thread-locking compound only if specified by the fixture design, as permanent locking compounds may prevent future removal or adjustment. Confirm plunger projection and locking function before placing the assembly into service.\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\u003eThread Length\u003c\/strong\u003e: 0.75 inches\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: Threaded Stud (without Knob)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaximum Plunger Diameter\u003c\/strong\u003e: 0.216 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Diameter Tolerance\u003c\/strong\u003e: +0.001 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.2188 inches (7\/32 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 1.691 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\/Shoulder\u003c\/strong\u003e: 0.9688 inches (31\/32 inches)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 13\/32 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 0.75 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 3 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInternal Stud Thread Size\u003c\/strong\u003e: 5\/16-18\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLocking Element\u003c\/strong\u003e: Yes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.03 pounds\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: GIBRALTAR\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: 34246SS\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GIBRALTAR","offers":[{"title":"Default Title","offer_id":51689860497714,"sku":"34246SS","price":52.51,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/d2d0665a0774e6198178e98009210b11_f14c1175-90f5-4406-ba1f-400fa633a70a.jpg?v=1788264845","url":"https:\/\/voomisupply.com\/products\/gibraltar-34246ss-locking-knob-plunger-3-8-16-thread","provider":"Voomi Supply","version":"1.0","type":"link"}