The Common Sense Washer 91-BS-78510-2A is a nickel-plated brass washer designed for reliable performance in outdoor and marine environments. This 1000 pack of washers features a durable back plate and four tabs that grip material tightly, providing strong holding power through multiple layers. Ideal for marine canvas, upholstery, tents, awnings, boat covers, luggage, gear bags, and outdoor fabric, these rust-resistant washers are built to last. Use them as curtain fasteners, canvas fasteners, or watercraft seat hardware for secure, long-lasting results. Each washer is made from nickel-plated brass, ensuring resistance to corrosion and dependable function in demanding conditions.