{"product_id":"azusa-engineering-3-8-drilled-shank-king-pin-4-0-length-grade-5-steel","title":"Azusa Engineering 3\/8\" Drilled Shank King Pin - 4.0\" Length - Grade 5 Steel","description":"\u003cp\u003eWhen you are upgrading your \u003cstrong\u003ekart and parts\u003c\/strong\u003e for the upcoming season, the Azusa Engineering 3\/8-inch Drilled Shank King Pin is the ultimate foundation for razor-sharp steering response. Whether you are tuning a high-compression setup with forged \u003cstrong\u003eengine pistons\u003c\/strong\u003e, dialing in a \u003cstrong\u003ewalbro carb\u003c\/strong\u003e, or restoring \u003cstrong\u003eadult go karts for sale\u003c\/strong\u003e, your steering precision dictates your lap times. This heavy-duty 4.0-inch king pin eliminates front-end slop, ensuring your steering inputs translate directly to the asphalt. A rigid front end means less scrubbing in the corners and higher exit speeds down the straightaway.\u003c\/p\u003e\n\n\u003ch2\u003eGrade 5 Steel for Maximum Cornering Loads\u003c\/h2\u003e\n\u003cp\u003eHigh-speed sweepers, aggressive braking zones, and hopping the curbs put immense stress on your kart's spindles. Machined from ultra-tough Grade 5 steel, this Azusa king pin resists bending and sheer forces, keeping your camber and caster locked in exactly where you set them. The precision-drilled shank allows for a secure castle nut and safety wire installation, guaranteeing your hardware stays put even when you are banging wheel-to-wheel in the final lap. It is the perfect chassis complement when you are maximizing your engine's power output with a fresh \u003cstrong\u003elo206 carburetor kit\u003c\/strong\u003e. If your chassis flexes or your king pin bends, all that horsepower is wasted.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications \u0026amp; Track-Ready Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrade 5 Steel Construction:\u003c\/strong\u003e Handles extreme steering stresses, heavy braking, and high-G cornering without bending or deflection.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision Drilled Shank:\u003c\/strong\u003e Specifically designed for use with a 3\/8-24 castle nut (AE8536) and safety wire or cotter pin for fail-safe retention.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4.0-Inch Overall Length:\u003c\/strong\u003e Perfectly sized to suit standard kart spindle depths, C-brackets, and yoke assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/8-24 Fine Thread Pitch:\u003c\/strong\u003e Provides superior clamping force and micro-adjustability for your steering assembly, preventing mid-race loosening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eZinc-Plated Finish:\u003c\/strong\u003e Actively shields the raw metal against rust and corrosion during wet weather races or humid trailer storage conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced Steering Play:\u003c\/strong\u003e Tight manufacturing tolerances eliminate front-end vibration, delivering unparalleled track feel and driver feedback.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Fits a wide range of vintage and modern racing chassis requiring a 3\/8\" diameter king pin setup.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eDon't let a compromised front end scrub your speed or ruin your race weekend. Secure your spindles with Azusa's proven, track-tested hardware and hit every apex with absolute confidence. When fractions of a second matter, trust the components that keep you pointed toward the checkered flag.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is the shank drilled on this king pin?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e The precision-drilled hole is designed for use with a castle nut and a cotter pin or safety wire. This is a critical safety feature in racing that prevents the nut from vibrating loose during high-speed cornering or heavy track vibration.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How do I know if this 4.0-inch king pin will fit my kart?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This king pin is designed for standard kart spindles and C-bracket assemblies that utilize a 3\/8-inch diameter bolt. Measure the total width of your spindle yoke and bracket assembly to ensure the 4.0-inch length provides enough clearance for the nut and safety hardware.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can I use this king pin for both vintage and modern racing karts?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Yes, this is a universal-style component. As long as your chassis requires a 3\/8-inch diameter king pin, this Grade 5 steel bolt is an excellent upgrade for both vintage restorations and modern racing chassis.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does this king pin come with the castle nut?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e This product is the king pin bolt itself. We recommend pairing it with a high-quality 3\/8-24 castle nut (such as Azusa AE8536) to take full advantage of the drilled shank for secure retention.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why choose Grade 5 steel over standard hardware store bolts?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eA:\u003c\/strong\u003e Standard hardware store bolts are often not rated for the high-G cornering loads and shear forces experienced in karting. Grade 5 steel provides the necessary tensile strength to prevent the pin from bending, which keeps your camber and caster settings consistent throughout the race.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products From Vendor\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/ae8137-steering-shaft-only-w-splined-end-28-ae8137\"\u003eAzusa Engineering AE8137 Splined-End Steering Shaft - 28\" Length - Custom \/ Open Class\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/aluminum-low-profile-open-top-tilted-steering-wheel-black-acw13lpb\"\u003eAzusa ACW13LPB Low-Profile Open-Top Tilted Steering Wheel - Black Aluminum - Sprint Kart\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"SwiftKarting","offers":[{"title":"Default Title","offer_id":52378759233855,"sku":"AE8473","price":12.92,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0968\/6843\/4239\/files\/spindlekingpin-ae8473-3-8-king-pin-4-0-with-drilled-shank-ae8473.jpg?v=1773221716","url":"https:\/\/metro-merch-3.myshopify.com\/products\/azusa-engineering-3-8-drilled-shank-king-pin-4-0-length-grade-5-steel","provider":"Metro Merch","version":"1.0","type":"link"}