Fine Pitch Hexagon Thin Nuts. Manufactured from A2 304 Stainless Steel to DIN 439 \/ ISO 4035.\r\nPlease note that these are sold in multiples of 5.\r\nHex Thin Nuts, also referred to as Half Nuts, Lock Nuts or Jam nuts. Sometimes mistaken for nyloc lock nuts, please note that these do not include a nylon insert. Tightened by a spanner or hex socket. These nuts are mostly used on their own with a washer or can be doubled up to produce a more secure connection.\r\nPlease note that these are fine pitch and will not fit standard metric course thread bolts.\r\nManufactured from A2 Stainless Steel these offer good corrosion resistance and are almost non magnetic.