Pinch the flexible nylon casing of these nuts to add threads to thin metal. Unlike typical rigid snap-in nuts, these squeeze into a square hole from the front or back of your material. Once installed, they stay put. They meet EN 61373, so they’re certified for use in environments with heavy vibration—think a bumpy railcar. NEBS GR-63-CORE tested, they’ve also passed earthquake simulations. In your facility, this means you can trust them to hold tight to sensitive equipment, like the servers suspended on your electrical racks.

Also known as cage nuts, they come in two parts—the cage and the nut—that you combine before installation. Threads float inside the cage, so you can fasten a bolt at a slight angle to align with off-center parts.