{"product_id":"gibraltar-34058-locking-knob-plunger-1-2-13-thread","title":"Gibraltar 34058 Locking Knob Plunger 1\/2-13 Thread","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThe GIBRALTAR 34058 is a locking plunger with a knobless threaded stud configuration, designed for use in workholding, fixturing, and positioning applications common in industrial and mechanical assembly environments. The plunger features a 1\/2-13 body thread and a thread length of 0.875 inches, with a maximum plunger diameter of 0.249 inches. Initial end force is 1.25 pounds, building to a final end force of 5 pounds, providing consistent spring-loaded holding force with a locking element to secure the plunger in the retracted or extended position. This part is typically installed by machinists, tool and die technicians, and maintenance mechanics working on jigs, fixtures, and adjustable tooling setups.\u003c\/p\u003e\n\u003cp\u003eThe 34058 is suited for light-duty locking and positioning tasks in machine shops, production lines, and fabrication environments. Its knobless threaded stud design allows it to be installed flush or into confined assemblies where a protruding knob is not practical. The plunger projection of 0.25 inches and a length under head or shoulder of 1.125 inches make it appropriate for compact fixture designs requiring controlled plunger engagement.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003eLocking element holds plunger in retracted or extended position without drift\u003c\/li\u003e\n  \u003cli\u003eKnobless threaded stud style allows installation in tight or recessed fixture locations\u003c\/li\u003e\n  \u003cli\u003e1\/2-13 body thread with 0.875 inch thread length for secure mounting\u003c\/li\u003e\n  \u003cli\u003eSpring force range from 1.25 pounds initial to 5 pounds final end force\u003c\/li\u003e\n  \u003cli\u003eMaximum plunger diameter of 0.249 inches with a tolerance of plus 0.001 inches\u003c\/li\u003e\n  \u003cli\u003ePlunger projection of 0.25 inches and plunger length of 1.937 inches\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eCompatibility\u003c\/h4\u003e\n\u003cp\u003eDesigned as a direct-fit locking plunger for industrial fixtures, jigs, and positioning assemblies requiring a 1\/2-13 threaded body and knobless stud installation style.\u003c\/p\u003e\n\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\n\u003cp\u003eInstallation is performed by machinists or maintenance technicians using standard threading tools compatible with 1\/2-13 thread forms. Ensure the mating threaded bore is clean and free of debris before installation. Secure the stud thread to the specified engagement depth for the application to maintain proper end-force performance. De-energize or lock out any machinery before servicing fixtures or tooling that incorporate this plunger.\u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBody Thread Size\u003c\/strong\u003e: 1\/2-13\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStud Thread Size\u003c\/strong\u003e: 3\/8-16\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThread Length\u003c\/strong\u003e: 0.875 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: 0.249 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Diameter Tolerance\u003c\/strong\u003e: plus 0.001 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Length\u003c\/strong\u003e: 1.937 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlunger Projection\u003c\/strong\u003e: 0.25 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLength Under Head\/Shoulder\u003c\/strong\u003e: 1.125 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Height\u003c\/strong\u003e: 0.4375 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInitial End Force\u003c\/strong\u003e: 1.25 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFinal End Force\u003c\/strong\u003e: 5 pounds\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: 0.06 pounds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e: 1\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: 34058\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GIBRALTAR","offers":[{"title":"Default Title","offer_id":51720994619698,"sku":"34058","price":51.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/5b54792d023b37f3867573c1fe8a2174_b64d16cf-0e4f-401d-b948-21607ab86e43.jpg?v=1788572017","url":"https:\/\/voomisupply.com\/products\/gibraltar-34058-locking-knob-plunger-1-2-13-thread","provider":"Voomi Supply","version":"1.0","type":"link"}