Features： 1、Using good quality stainless steel, possess high hardness, wear resistance and durability 2、There are many lengths to choose from, You can use a metal cutting blade according to your own needs to cut dia 5mm stainless steel hex nut into different length 3、The outer diameter is 5mm, the appearance is a hex shape of 4mm flat spacing, which is a combination of a circular axes with diameter of 5mm and a hex shape with plane spacing of 4mm 4、Come with the advantages of two axes of the circular and the hex, can be used with other robot parts with a hexagonal hole, very useful 5、Effectively prevent parts from rotating and slipping on hex axes, making the force of the parts more average, greatly increasing friction and transmission or driving force efficiency, very reliable 6、Can also be used through the bearing with an inner diameter of 5mm and other robot parts with matching hexagonal holes, greatly enhancing the bearing and transmission capacity of robot parts 7、Used for the driving shaft accessories of intelligent robot, also applied to lathe equipment and engineering equipment Specification： Item Type: Long Rod Nut Compatible With: For Gobilda, for TETRIX Material: Stainless steel Purpose: Used as the driving shaft accessories of intelligent robot, also applicable to lathe equipment and engineering equipment Diameter: Approx. 5mm / 0.2in Package List： 10 x Long Rod Nut