All Categories > Alloy Steel > Alloy Steel Round Bar > 4340 Alloy Steel Round Bar > Item # 16158 All CategoriesAll Categories Alloy SteelAlloy Steel Alloy Steel Round BarAlloy Steel Round Bar 4340 Alloy Steel Round Bar4340 Alloy Steel Round Bar Item # 16158 Item # 16158, 4340 Alloy Steel Round Bar 161584340 Alloy Steel Round Bar Request Information Email This Page Download PDF Download PDF Printable Page Close Window Unit of Measure Imperial Metric Both Specifications Size N/A 1/2 inches Size N/A 0.5 inches12.7 mm Material N/A Alloy Steel Shapeform N/A Round Bar