The standard : DIN 434, 435 and 436 Material: stainless steel 304, 316, 301 or other materials Packing: box/ carton/ pallet or bulk in cartons/ pallet Lead time: within 45 days after receiving the order Port: Shanghai, China Square Washers are used to timber constructions.The standard includes DIN 434, 435 and 436. We can also manufacture to drawing or samples. If any details, please kindly contact us.