[200 PKG] Steel Black Oxide & Oil Carriage Bolts 3/8-16 X 4

<p>Steel Black Oxide & Oil Carriage Bolts 3/8-16 x 4 are built for dependable, wood-to-wood and machinery assemblies. Crafted from durable steel, these carriage bolts feature a black oxide finish with an oil coating that helps resist wear and provides a handsome, low-profile appearance.</p> <h3>Key specifications</h3><ul> <li><b>Diameter</b>: 3/8 in</li> <li><b>Thread</b>: 3/8-16 UNC</li> <li><b>Length</b>: 4 in</li> <li><b>Finish</b>: Black oxide with oil coating</li> <li><b>Head style</b>: Carriage bolts with a square under the head to prevent turning</li> <li><b>Material</b>: Steel</li></ul> <h3>Why choose these carriage bolts?</h3><p>Carriage bolts are a classic choice for woodworking and furniture projects due to their clean, rounded heads that sit flush in countersunk surfaces and their square neck underneath to resist turning when tightened. The 3/8-16 size is a versatile fit for many standard fastener applications, and the 4-inch length offers strong engagement in thicker materials.</p> <h3>Applications</h3><p>Ideal for decking, wooden structures, furniture assembly, gate hardware, and other projects where a secure, aesthetically discreet bolt is desired. The steel core provides strength, while the black oxide and oil finish adds a stealthy look and smoother installation.</p>