Abstract: A particle grinder includes a container having at least one opening in a wall thereof; a sound isolation layer covers a major portion of the exterior surface of the container and an elogated fastening device passes through the opening, fastening the sound isolation layer to the container. The fastening device includes a bolt and a nut threadable onto the bolt. A first sleeve composed of substantially non-deformable material surrounds the elongated fastening device at least partially within a region of the opening, and a second and resilient sleeve surrounds the first sleeve, at least partially and normally projects exteriorly therebeyond. A clearance exists normally between the sleeves and the sound isolation layer abuts an exterior portion of the second sleeve. A resilient seal is disposed around the periphery of a portion of the fastening device, and between the first sleeve, and the container.