The 7721-15NG is a nylon shoulder washer manufactured by Boyd Laconia LLC (Aavid Thermal Division) for use in thermal management and electronic component mounting. This RoHS-compliant washer features dimensional specifications with outer diameter ranging from 5.59 to 6.10 mm (0.220 to 0.240 inches), inner diameter from 3.43 to 3.58 mm (0.135 to 0.141 inches), and thickness from 0.51 to 0.64 mm (0.020 to 0.025 inches). The washer is engineered to provide electrical insulation and mechanical support in heat sink and component mounting applications. It is commonly used in thermal interface assemblies and electronic packaging where isolation and precise positioning are required.