{"product_id":"gibraltar-kn8c-b3s-21-ball-knob-1-38-in-female-insert","title":"Gibraltar KN8C----B3S--21 Ball Knob 1.38 in Female Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GIBRALTAR KN8C----B3S--21 is a thermoplastic ball knob with a female insert mount designed for use on machinery, equipment panels, jigs, and fixtures across trade and industrial applications. The knob measures 1.38 inches in diameter and features a 1\/2-13 threaded female insert for secure attachment to mating fasteners or threaded studs. Constructed from black thermoplastic, it provides a firm, comfortable grip in hand-adjustment and positioning tasks. The ball-style grip shape allows controlled torque application without tools, making it practical for frequently adjusted components. Weighing 0.4 pounds, the part ships individually and is available in single-unit quantities.\u003c\/p\u003e\u003cp\u003eThis ball knob is suited for light-duty manual adjustment applications in industrial, HVAC, and mechanical equipment environments. It is typically installed on panel-mounted threaded studs, machine levers, or adjustment screws where tool-free hand operation is required. The female insert thread configuration allows it to press or thread onto a protruding stud. The black thermoplastic construction resists common shop fluids and provides adequate durability for indoor mechanical use.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale insert mount with 1\/2-13 thread size for direct stud engagement\u003c\/li\u003e\n\u003cli\u003eBall grip style allows controlled hand-torque without tools\u003c\/li\u003e\n\u003cli\u003e1.38-inch diameter head for secure hand grip\u003c\/li\u003e\n\u003cli\u003eThermoplastic construction in black finish\u003c\/li\u003e\n\u003cli\u003eHub diameter of 0.75 inches with a hole depth of 0.55 inches\u003c\/li\u003e\n\u003cli\u003eLightweight at 0.4 pounds per unit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as a replacement or add-on female-insert ball knob for equipment and machinery using 1\/2-13 threaded studs or fasteners requiring a hand-adjustable thermoplastic knob.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires no special tools — the knob threads or presses onto a compatible 1\/2-13 threaded stud by hand. Ensure the mating stud length does not exceed the hole depth of 0.55 inches to prevent bottoming out before the knob seats properly. Power down or de-energize any equipment before servicing panels or adjustment mechanisms where this knob is being replaced. Verify thread engagement is secure before returning equipment to service.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMount Type\u003c\/strong\u003e: Female Insert\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size\u003c\/strong\u003e: 1\/2-13\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrip Type\u003c\/strong\u003e: Ball\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnob Material\u003c\/strong\u003e: Thermoplastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 1.38 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 1.30 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub Diameter\u003c\/strong\u003e: 0.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Depth\u003c\/strong\u003e: 0.55 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 0.4 pounds\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\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: KN8C----B3S--21\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GIBRALTAR","offers":[{"title":"Default Title","offer_id":51722781458738,"sku":"KN8C----B3S--21","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/a288c54bf8a481b090948b54f60a50a8.jpg?v=1788595821","url":"https:\/\/voomisupply.com\/products\/gibraltar-kn8c-b3s-21-ball-knob-1-38-in-female-insert","provider":"Voomi Supply","version":"1.0","type":"link"}