0620 PB - Wide. The FRANK ALLART 600 Series Sprung Loaded Dust Excluding Floor Socket is a premium-grade architectural hardware component designed to accept drop bolts and flush bolts in double door sets. Featuring a spring-loaded cover, this floor socket automatically seals when not in use, effectively keeping out dust, dirt, and debris. Manufactured with attention to both form and function, it’s ideal for high-traffic environments where aesthetics and long-term performance are key.. Designed to receive drop bolts and flush bolts in floor-mounted applications. Spring-loaded cover closes automatically to exclude dust and debris. Enhances door appearance and prolongs hardware life. Suitable for timber, metal, and composite flooring systems