Self Eject Quik Fastener .500in Medium Body

The Self Eject Quik Fastener .500in Medium Body from Moroso is a precision quick-turn fastener engineered for applications requiring rapid assembly and disassembly without tools. Designed with a self-ejecting mechanism, this fastener eliminates the need for manual extraction or secondary hardware removal, making it ideal for engine bay components, transmission covers, fuel system access panels, and any assembly that demands quick serviceability. The flush-head slotted design ensures a clean, professional appearance while maintaining full functionality in high-vibration environments.

Built from zinc-plated steel, this medium-body fastener resists corrosion and withstands repeated cycling without degradation. The 5/16-inch shank diameter combined with the .500-inch body length provides optimal load distribution across a range of panel thicknesses and material densities. The self-ejecting mechanism uses a spring-loaded action that automatically expels the fastener when rotated counterclockwise, eliminating lost time searching for small hardware in tight engine compartments. The slotted flush head accepts standard slot-drive tools and sits flush against panel surfaces, reducing snag hazards and maintaining aerodynamic profiles where appearance matters.

Motorsports enthusiasts, fabricators, and technicians benefit most from this fastener set, particularly those performing frequent maintenance on intake manifolds, valve covers, and accessory brackets. Each set includes 10 units, providing sufficient inventory for a complete panel or multiple small assemblies. Installation requires only a compatible slotted driver—no specialized tools or secondary fasteners needed. The zinc-plated finish delivers long-term corrosion resistance in underhood environments, while the self-eject design dramatically reduces assembly and disassembly time during engine builds and routine service intervals.