5/8-18 NTE Thin Pattern Nylon Insert Hex Lock Nut Zinc M4-.7 and the 1/2 refers to

and the 1/2 refers to the length of the bolt

The 3/8-16 x 3 1/2 Hex Cap Screw Grade 5 Zinc is a high-quality fastener designed for use in a variety of applications

Its hex head design ensures easy installation and removal using a standard hex key

The 5/16-18 x 4 1/2 Hex Cap Screw Grade 8 Yellow Zinc is a high-strength fastener designed for demanding applications

Their locking design prevents loosening due to vibration or movement

5/8-18 NTE Thin Pattern Nylon Insert Hex Lock Nut Zinc M4-.7 and the 1/2 refers toThe 5 8 18 NTE Thin Pattern Nylon Insert Hex Lock Nut Zinc is a type of nut that is used to secure bolts and screws in place. It is made of zinc plated steel and has a nylon insert that helps to prevent the nut from loosening. The thin pattern design of this nut allows it to be used in tight spaces. This nut is commonly used in automotive, construction, and other industrial applications.