Metric fine bolts, also known as metric fine thread bolts or simply fine bolts, are a type of fastener commonly used in applications where a higher level of thread engagement or finer adjustment is needed. They are often used in machinery, automotive, and precision engineering industries. The fine threading provides a stronger grip and allows for more precise adjustment or alignment of components.
The term "metric fine" refers to the threading specification of the bolt. Fine bolts have a finer pitch compared to standard metric bolts. The pitch refers to the distance between the threads measured in millimeters. In the case of metric fine bolts, the pitch is smaller, which means the threads are closer together.
The thread pitch of metric fine bolts is denoted by a number following the thread size. For example, M10x1.25 denotes a metric fine bolt with a thread size of 10 millimeters and a pitch of 1.25 millimeters. The pitch can vary depending on the specific application and requirements.
We stock Grade 8.8 and Grade 10.9 in a part thread bolt (Din 931) and full thread bolt (Din 933), also referred to as a setscrew. They are available in zinc plated, zinc yellow and unplated self colour steel.