Have you ever stumbled upon a curious metal object while rummaging through your drawers, particularly among sewing supplies? It may appear unassuming at first, with its simple and utilitarian design, but it serves a very specific purpose that might surprise you.

Identifying the Object

The metal hook-like items in the photo you found are called cotter pins (also known as split pins). Cotter pins are fasteners used to secure bolts or other fasteners and prevent them from loosening due to vibrations or other forces. They consist of a looped end and a split shaft, which is bent back after being inserted through a hole.

How Cotter Pins Work

When used, a cotter pin is inserted through a pre-drilled hole in a bolt, shaft, or similar hardware component. Once the pin is in place, the split ends are bent outward, locking the pin and preventing it from slipping out. This simple yet effective mechanism makes cotter pins invaluable in various mechanical applications, from automotive repairs to machinery assembly.

Why It Was with Your Sewing Supplies

Finding a cotter pin among sewing supplies might seem odd, but there are practical reasons for its presence. Occasionally, cotter pins are used in sewing machines to secure various moving parts, like the needle clamp or presser foot. Additionally, those who engage in crafts that combine fabric and hardware might keep these pins on hand for making customized accessories or home decor items.

Conclusion

Next time you come across a metal hook-like item in your sewing supplies, you’ll know that it’s more than just a random piece of metal. Cotter pins are small but essential tools that play a critical role in securing and maintaining mechanical systems, whether in a sewing machine or more complex machinery. So, even if you don’t need it for your sewing projects, it might be worth keeping around for other household tasks!