What Every Member of the Trade Community Should Know About: Distinguishing Bolts from Screws [open pdf - 208KB]
"Regulations and Rulings (RR) of the Office of International Trade has been given a major role in meeting the informed compliance responsibilities of U.S. Customs and Border Protection [CBP]. In order to provide information to the public, CBP has issued a series of informed compliance publications on new or revised requirements, regulations or procedures, and a variety of classification and valuation issues. This publication, prepared by the National Commodity Specialist Division of Regulations and Rulings is entitled 'Distinguishing Bolts from Screws.' It provides guidance regarding the classification of these items."
U.S. Customs and Border Protection: http://www.cbp.gov/