Avoid the dreaded spring bar failure! Our strong, seamless, heavy duty 316L stainless steel spring bar pins won’t bend or break. We have 1.5mm, 1.8mm (including fat and curved) and 2.5mm diameters. The fat 2.5mm shaft diameter with 0.8mm tip is perfect for many Seiko and other dive watches. Double-flange construction. Sizes 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm and 24mm.