1/4-20 Captive Mounting Screw | 0.40" Thread Length with 5/32" Hex Head

The Hejnar Photo 1/4-20 Captive Mounting Screw is a professional-grade, high-tensile structural fastener custom-engineered for camera support equipment, quick-release plates, and technical macro rails. Featuring an optimized 0.40-inch thread length and a low-profile 5/32" hex socket head, this captive fastener is designed specifically to work with a blind hole layout on your camera gear. It provides an unyielding physical connection that completely eliminates hardware play and ensures maximum camera security on professional tripods and gimbal rigs.

Quick Overview & Key Features

• Precision 1/4-20 Threading: Standard photo-industry connection thread size compatible with most digital camera bodies, medium telephoto lenses, and tripod plates.
• Optimized 0.40" Thread Length: Specifically sized shank dimension engineered to provide ample thread engagement without bottoming out in short-bore receivers.
• Captive Shank Architecture: Designed explicitly for use with unthreaded clearance recesses or counterbored channels, keeping the hardware safely retained so it cannot fall out of your plate.
• 5/32" Hex Socket Drive: Heavy-duty internal drive socket accommodates standard 5/32" Allen keys, allowing you to apply high tightening torque without slipping or stripping.
• Blind Hole Optimized: Engineered specifically to secure equipment featuring blind threaded sockets, providing a clean flush seat against the plate structure.
• Premium Stainless Steel: Forged from high-grade, corrosion-resistant stainless steel to handle harsh outdoor elements and heavy structural load distributions.
• Made in the USA: Precision-manufactured to strict industrial tolerances to ensure lifelong field and studio reliability.

Technical Specifications

• Thread Size: 1/4"-20 (Standard Photo Thread)
• Thread Length: 0.40 inches
• Drive System: 5/32" Hex Socket Head
• Material Construction: High-Strength Stainless Steel
• Mounting Interface Type: Captive style (for blind holes and slotted channels)

Product Description

The premium Hejnar Photo 1/4-20 Captive Mounting Screw (0.40" Length) 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.

The definitive mechanical advantage of this specific model is its specialized captive neck architecture. When deployed inside a matching quick-release plate or macro rail equipped with an unthreaded clearance slot, the unthreaded portion of the screw neck allows the bolt to slide and spin freely within the channel without backing out or falling on the ground when the gear is detached. This design is highly optimized for equipment utilizing a blind hole layout, allowing you to compress the plate firmly against your camera body or telephoto lens foot for a perfect, twist-free seat.

Engineered for high-performance pacing in punishing outdoor field environments, the screw head houses a deep, precision-milled 5/32" hex socket well. 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.