18mm x 2.5mm

Metric Fasteners

Metric hex bolt

Hex bolts

Bolts with hexagonal heads and machine threads for use with a nut or in a tapped hole. Also known as hex cap screws or machine bolts.
Nut

Nuts

Nuts have internal machine threads, for use with machine thread bolts and screws.
Forged machinery eye bolts with shoulder

Eye bolts & Screw eyes

Bolts or screws with a circular ring on the head.