Square Thin Nut Standard: DIN 562, Square Nuts Standard: DIN 557，Low-Strength Steel Square Nuts，18-8 Stainless Steel Square Nuts
Large flat sides make these nuts easy to grip with a wrench and keep them from rotating in channels and square holes. About half the strength of medium-strength steel square nuts, use them in light duty fastening applications, such as securing access panels.
Zinc-plated steel square nuts resist corrosion in wet environments.
Hot-dipped galvanized steel square nuts have a thick coating for better corrosion resistance than zinc-plated steel nuts. They must be used with other hot-dipped galvanized fasteners.