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Whether you're a DIY enthusiast, a professional contractor, or an industrial manufacturer, we’ve got you covered with our extensive selection of bolts, nuts, screws, washers, and more!

Free charts and tools in PDF format, including full size 'lay-over' sizing charts, that you can use to quickly and easily identify fasteners. Grease fittings, also known as Zerk fittings, provide a …

Bolts and screws are externally threaded male fasteners that are used with female-threaded fasteners or holes. Bolts are normally inserted through the materials being connected and held …

Used for construction where they’re exposed to the weather, most bolts are available in zinc-plated, galvanized or stainless-steel finishes for durability. No matter what your project calls …

Monster Bolts is your top choice for metric & US-sized fasteners. Shop now for a great selection of nuts, washers, screws, bolts, electrical connectors & more.