Hex Collar Weld Nut

四角焊接螺帽 

a) This metallic nut features a flanged base with serrated grooves encircling its body.

b) This part is used for secure fastening in mechanical assemblies, with features designed to resist loosening under vibration.

c) The external structure, the serrated grooves or knurls, enhances grip for improved stability. 

ISO 4035 / DIN 439B

Cage nut consists of a nut in a spring steel cage which wraps around the nut.

Steel two pieces hex collar cap nut

Hexagon flange white nylon insert lock nut serrations