Common Sense Washer 91-BS-78505-2C Government Black Brass 1000 pack offers a reliable solution for reinforcement and support applications with its flat, black oxide finish crafted from durable copper alloy brass. This government specification washer is designed for use as a hardware washer, military washer, and industrial washer, making it versatile for sheet metal, DOT fastener, and setting tool uses. Its consistent quality and pack size of 1000 make it practical for large-scale projects, providing steady performance where a dependable flat washer is required.