25mm Pins for Mini Excavator Attachment Connection. Enhance your mini excavator with these high-quality 25mm pins for attachment connection. With these pins, you can easily attach other attachments to your machine, making your job easier and more efficient. Whether you’re in the construction, farming, or landscaping industry, these pins are a must-have for any mini excavator attachment. Specification —————— Pin Diameter: 25mm Length: 170mm Head Type: 32mm Hex Head (Anti-rotation) Lubrication: Integrated Grease Nipple / Zerk Fitting Material: High-Carbon Steel .