Marine Fasteners RP-85 Hex Cap Screw 5/16-18 x 3 in Stainless Steel 10-Pack

The Marine Fasteners RP-85 is a 5/16-18 x 3-inch hex cap screw sold in a convenient 10-piece pack. Engineered for use in demanding marine environments, these hex cap screws are built to resist the corrosive effects of saltwater, humidity, and harsh weather conditions that cause standard hardware to fail prematurely.

Key Features:

• Size: 5/16 in. diameter x 3 in. length with 18 threads per inch (UNC coarse thread)
• Head Style: Hex cap (hex head) with washer-bearing surface under the head and chamfered thread end
• Marine-Grade Construction: Stainless steel material provides superior corrosion resistance for saltwater and coastal installations
• Partial Thread: Standard partial thread configuration per ASME B18.2.1 dimensional specifications
• Wrenching: Standard 1/2 in. hex wrench or socket required for installation
• Quantity: Sold as a 10-piece pack

These hex cap screws are ideal for securing deck hardware, engine mounts, marine fittings, and other structural assemblies aboard boats, docks, and other watercraft. For best results in stainless-to-stainless applications, apply a marine-grade anti-seize compound to threads before installation to prevent galling and ensure easy future removal.