Arrow Fastener 1/8 in. Dia. Aluminum Flat Washers Silver 30 pk Pack of 2. FLT WSHR AL 1/8"X 30PK The Arrow Fastener WA1/8 1/8-inch aluminum washer is ideal for joining soft materials or when an existing hole is oversized. Designed for use with The Arrow Fastener RHT300, RH200S and RL100S rivet tools. Made with durable construction. Made in the USA.