http://www.yugoodhw.com/nuts/Nuts Flange nuts greatly reduce the possibility of component damage. Surface treatment: Polished, Galvanizing, electroplating, white zinc, color zinc, black zinc, white nickel, environmental protection blue zinc. China Standard: DIN, ISO, ASNI, GB, NON-STANDARDS. Qualified Measurement System: Metric, Inch. Material: stainless steel, carbon steel, iron, according to the requirement of customers. Product Information Product NameSteel Flange Nut Brand NameYu-good SizeWe have all the sizes you order FeatureAnti-Rusty, Smooth Surface, High Durability PaymentT/T. PayPal. Western Union. Delivery time5-8DAYS, ac