According to provisions of the national standard GB/T 3098.2-2015 "Mechanical Properties of Fasteners Nuts", bolts made of carbon steel and alloy steel have 7 types of mechanical properties under the condition of environmental dimension of 10℃～35℃. They are 04, 05, 5, 6, 8, 10, 12 respectively.

The function of hexagonal nut is to cooperate with bolt to achieve the purpose of fastening. Usually, in order to improve the service life of the hexagonal head hex nut, hot dip galvanized plating is the first choice for the hexagonal nut.

Nylon locking hexagon nuts mainly rely on the nylon washer in the hexagon nut to play a locking role, which is usually referred to as nylon nut or nylon insert lock nut or just locking nut in the industry. Nylon hex nuts are mainly used in conjunction with threaded screws or bolts for connection.

Hex nuts are used in conjunction with screws and bolts to connect parts. ASME ANSI hex nut covers the dimensional requirements of inch series hex nut. The common standard of ASME/ANSI hex nut is ASME B18.2.2. It includes normal hex nut, hex thin nut, hex thick nut and heavy hex nut. The size from 1/4-4" diameter. DIN standard is DIN934.