{"product_id":"gibraltar-kn4c-b4-21-g-ball-knob-1-1-2-in-female-insert","title":"Gibraltar KN4C-B4-21-G Ball Knob 1-1\/2 in Female Insert","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe GIBRALTAR KN4C-B4-21-G is a thermoplastic ball knob with a female insert mount, designed for use on machine controls, adjustable fixtures, and industrial equipment where a secure, hand-operated grip is needed. The knob measures 1-1\/2 inches in diameter and stands 1-13\/32 inches tall, with a smooth grip surface and a black finish. The female insert accepts a 1\/4-20 threaded fastener with a hole depth of 5\/8 inches. This style of control knob is installed by machinists, equipment technicians, and maintenance professionals on a wide range of light industrial and commercial applications.\u003c\/p\u003e\u003cp\u003eThis ball knob suits residential and commercial equipment panels, jigs, fixtures, clamps, and adjustable mechanical assemblies that require frequent manual positioning. The female insert design allows it to thread directly onto a 1\/4-20 stud or bolt without additional hardware. It is a standard replacement or upgrade knob for control panels, machine tool setups, and equipment enclosures requiring a reliable hand grip.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eFemale insert mount accepts 1\/4-20 threaded fasteners directly\u003c\/li\u003e\n\u003cli\u003e1-1\/2 inch diameter ball profile for comfortable hand grip\u003c\/li\u003e\n\u003cli\u003eThermoplastic construction offers durability and chemical resistance in light industrial use\u003c\/li\u003e\n\u003cli\u003eSmooth grip surface suits applications requiring clean, snag-free operation\u003c\/li\u003e\n\u003cli\u003e5\/8 inch hole depth provides adequate thread engagement for secure fastening\u003c\/li\u003e\n\u003cli\u003eBlack color finish for a standard, professional appearance on control panels\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned as an OEM-style replacement or standard-fit control knob for equipment and fixtures using 1\/4-20 threaded studs or bolts requiring a 1-1\/2 inch diameter ball knob with female insert mount.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation requires no special tools — thread the knob directly onto a 1\/4-20 stud by hand until snug. Verify that the stud length does not exceed the 5\/8 inch hole depth to avoid bottoming out before full seating. No power shutoff is required for most panel and fixture installations, but always follow applicable equipment lockout procedures when working on energized machinery.\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\/4-20\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKnob Material\u003c\/strong\u003e: Thermoplastic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter\u003c\/strong\u003e: 1-1\/2 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 1-13\/32 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHole Depth\u003c\/strong\u003e: 5\/8 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrip Type\u003c\/strong\u003e: Smooth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor\u003c\/strong\u003e: Black\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 1 pound\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: KN4C-B4-21-G\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"GIBRALTAR","offers":[{"title":"Default Title","offer_id":51712112066866,"sku":"KN4C-B4-21-G","price":14.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/2c44f1b5ee920ef1608733f188c9994a.jpg?v=1788484021","url":"https:\/\/voomisupply.com\/products\/gibraltar-kn4c-b4-21-g-ball-knob-1-1-2-in-female-insert","provider":"Voomi Supply","version":"1.0","type":"link"}