{"product_id":"1-4-20-captive-screw-750-under-head","title":"1\/4-20 Button Head Captive Mounting Screw | 0.750\" Under-Head Length","description":"\u003c!-- ===================== GRAY BANNER ===================== --\u003e\n\u003cdiv style=\"background: #e5e5e5; padding: 12px 15px; margin-bottom: 18px;\"\u003e\u003cstrong\u003eHejnar Photo Premium 1\/4-20 Captive Mounting Screw – 0.750\" Length Under Head with 5\/32\" Hex Socket Head\u003c\/strong\u003e\u003c\/div\u003e\n\u003c!-- ===================== SEO BLOCK (TOP) ===================== --\u003e\n\u003ch1\u003e1\/4-20 Button Head Captive Mounting Screw | 0.750\" Under-Head Length\u003c\/h1\u003e\n\u003cp\u003eThe \u003cstrong\u003eHejnar Photo 1\/4-20 Captive Mounting Screw\u003c\/strong\u003e is a professional-grade, high-tensile structural fastener custom-engineered for camera support equipment, quick-release plates, heavy telephoto lens feet, and technical macro rails. Featuring an extra-long \u003cstrong\u003e0.750-inch (3\/4\") total length measured from directly under the screw head\u003c\/strong\u003e and a low-profile \u003cstrong\u003e5\/32\" hex socket head\u003c\/strong\u003e, this captive fastener is designed specifically to work with deep-set counterbored channels, heavy-duty replacement feet, or ultra-thick base plates. It provides an unyielding physical connection that completely eliminates hardware play and ensures maximum camera security on professional tripods and gimbal rigs.\u003c\/p\u003e\n\u003chr\u003e\u003c!-- ===================== QUICK OVERVIEW \u0026 KEY FEATURES ===================== --\u003e\n\u003ch2\u003eQuick Overview \u0026amp; Key Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrecision 1\/4-20 Threading:\u003c\/strong\u003e Standard photo-industry connection thread size compatible with most digital camera bodies, medium-to-large telephoto lenses, and tripod plates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.750\" Under-Head Clearance:\u003c\/strong\u003e Extended 3\/4-inch total shaft length (including the unthreaded neck and threaded portion) measured entirely from beneath the screw head to accommodate deep or thick-walled gear plates.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCaptive Shank Architecture:\u003c\/strong\u003e Designed explicitly for use with unthreaded clearance recesses or counterbored channels, keeping the hardware safely retained so it cannot fall out of your plate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e5\/32\" Hex Socket Drive:\u003c\/strong\u003e Heavy-duty internal drive socket accommodates standard 5\/32\" Allen keys, allowing you to apply high tightening torque without slipping or stripping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow-Profile Cylindrical Head:\u003c\/strong\u003e Precision-milled to sit flush or recessed inside standard quick-release plate slots, preventing mechanical interference with tripod clamps.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium Stainless Steel:\u003c\/strong\u003e Forged from high-grade, corrosion-resistant stainless steel to handle harsh outdoor elements and heavy structural load distributions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA:\u003c\/strong\u003e Precision-manufactured to strict industrial tolerances to ensure lifelong field and studio reliability.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ===================== TECHNICAL SPECIFICATIONS ===================== --\u003e\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eThread Size:\u003c\/strong\u003e 1\/4\"-20 (Standard Photo Thread)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength Under Head:\u003c\/strong\u003e 0.750 inches (3\/4\") total shaft reach\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrive System:\u003c\/strong\u003e 5\/32\" Hex Socket Head\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Construction:\u003c\/strong\u003e High-Strength Stainless Steel\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMounting Interface Type:\u003c\/strong\u003e Captive style (for unthreaded slider channels, slots, and thick-walled feet)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ===================== PRODUCT DESCRIPTION ===================== --\u003e\n\u003ch2\u003eProduct Description\u003c\/h2\u003e\n\u003cp\u003eThe premium \u003cstrong\u003eHejnar Photo 1\/4-20 Captive Mounting Screw (0.750\" Under-Head Length)\u003c\/strong\u003e is a critical hardware replacement and component asset for sports, wildlife, portrait, and action photographers who require total stability from their support platforms. Because tracking heavy camera rigs puts continuous vibrational and rotational stress on your equipment connections, cheap zinc-plated screws can flex or loosen over time. This heavy-duty stainless steel fastener resolves that physical vulnerability entirely, delivering a rigid lockup that dampens micro-vibrations and completely eliminates rotation.\u003c\/p\u003e\n\u003cp\u003eThe definitive mechanical advantage of this specific model is its specialized \u003cstrong\u003ecaptive neck architecture\u003c\/strong\u003e combined with an extended 0.750\" shaft reach. This dimension dictates the total usable height **underneath the screw head**, meaning the combined width of the unthreaded captive section and the functional threads totals exactly 3\/4 of an inch. When deployed inside a matching quick-release plate or macro rail equipped with an unthreaded clearance slot, this clearance allows the bolt to slide and spin freely within the channel without backing out or falling on the ground when the gear is detached. It is highly optimized for extra-deep connection points or specialized custom spacers, ensuring a maximum safety margin of thread engagement under maximum load.\u003c\/p\u003e\n\u003cp\u003eEngineered for high-performance pacing in punishing outdoor field environments, the screw head houses a deep, precision-milled \u003cstrong\u003e5\/32\" hex socket well\u003c\/strong\u003e. Unlike standard slotted screws that easily strip when tightened with a coin or flat screwdriver, this internal hex drive allows you to deploy a standard L-key to deliver massive manual leverage. This ensures an exceptionally firm lockup that won't give way during rapid transitions between landscape and portrait panning configurations. Non-corrosive, rust-proof, and milled in the USA to elite structural standards, this captive screw ensures your technical support train remains tightly grouped together and fully functional on every shoot.\u003c\/p\u003e","brand":"Hejnar Photo","offers":[{"title":"Default Title","offer_id":67701589508201,"sku":"0.750_Captive_Screw","price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0794\/1278\/9353\/files\/3-4_Captive_Screw-2.jpg?v=1792110603","url":"https:\/\/www.hejnarphotostore.com\/products\/1-4-20-captive-screw-750-under-head","provider":"Hejnar Photo","version":"1.0","type":"link"}