Hillman Hex Cap Screws - 18-8 1/2"-13 are bolts with hexagonal heads and machine threads. They can be used with a nut or in a tapped hole. These screws are bolts with a washer face under the head.

Features/Specifications

• Made using grade 18-8 steel: appropriate for marine applications (match with grade 18-8 washers & nuts)
• Partially threaded shank: allows for a stronger grip between objects & less shear movement
• Best-in-class corrosion protection: #18-8 stainless steel finish combines a polished look with superior protection against rust & corrosion
• High-torque design: hex cap head & machine threads combine to offer higher torque capability
• Pre-drilling recommended: for installation, drill a hole in the material that matches the diameter of the bolt