YKK SNAD Domed Socket #PG1-0000-A01 is a 1-9/16 inch (40mm) black plastic snap fastener designed for easy adhesive installation without drilling. Its dome shape resists cracking, corrosion, and discoloration while preventing snagging and allowing simple cleaning. Equipped with 3M VHB adhesive, this self-adhesive snap fastener firmly attaches to surfaces like marine canvas, cushions, tarps, and outdoor upholstery, making it ideal for marine and outdoor use. Compatible with standard snap components, it withstands UV exposure, sand, dirt, and can even be walked on without discomfort, offering a practical no-drill solution for upgrading or repairing outdoor and marine projects.