The American Standard M918990-0070A Self Tapping Screw is a genuine replacement part for some American Standard faucets like the Portsmouth Central Thermostat. Consumers who price products that will give them a run for their money have always trusted American Standard!What's so great about such a small replacement part? The M918990-0070A 's functional design and superior durability reflects American Standard's endless creativity and prowess in achieving customer satisfaction. Crafted for a smooth operation, it contributes to making sure that your faucet works properly for your utmost convenience. This American Standard M918990-0070A Self-Tapping Screw is developed to perform and last the way it is originally intended to. American Standard is legendary for their products' water efficiency, quality, and style. They continue to edge to the upper end of the market with their innovations that find their way into more homes and establishments in the USA and around the world.