This BSW hex nut, manufactured to BS 1083, is made from Grade A steel and features an electro-galvanized finish, making it suitable for indoor use or applications with very mild exposure. The nut has a British Standard Whitworth thread. Whitworth threads (BSW/BSF) are not recommended for international use; for new construction, we advise using metric (M/MF/MEF) or Unified (UNC/UNF) threads instead. Dimensions may vary slightly depending on availability.