járnpinnar

Járnpinnar is an Icelandic term that translates to 'iron pins.' It refers to slender metal fasteners used to join or secure parts in a variety of settings, most commonly in woodworking and historical metalworking. The exact form and usage can vary by region and era.

In timber construction and woodworking, iron pins act as dowels or locking pins in joints such as mortise-and-tenon or to secure components to wheels, axles, or furniture. They are typically cylindrical, sometimes with a head on one end, and are driven into aligned holes. When needed, ends may be peened or clinched to prevent withdrawal. Historically they were made from wrought iron; later examples used steel.

In railway and other industrial contexts, iron pins have served as fasteners or alignment aids, with similar function to pins used to hold parts together or to position components during assembly. The terminology varies between regions and periods; some similar devices are called rail pins or pins used to anchor elements to sleepers. In modern practice, pins are often replaced by bolts, screws, clips, or other fasteners that provide easier installation and stronger retention.

Manufacture and care: iron pins can be produced by forging or drawing steel to the required diameter and length. Surface treatment such as galvanization or bluing reduces corrosion, while stainless variants offer longer life in exposed environments. Proper fit is essential to minimize stress concentrations and corrosion at joints.