Marine Fasteners RP-146 Hex Cap Screw 1/2-13 x 4in 316 Stainless Steel 5-Pack

The Marine Fasteners RP-146 is a 5-piece pack of 1/2-13 x 4-inch hex cap screws crafted from 316 marine-grade stainless steel for maximum corrosion resistance in saltwater and harsh marine environments. The 1/2-13 designation indicates a 1/2-inch nominal diameter with 13 threads per inch (UNC coarse thread), and the 4-inch grip length makes these fasteners well-suited for thicker structural assemblies on boats, docks, and watercraft.

Key Features:

• Marine-Grade 316 Stainless Steel — Provides superior resistance to salt spray, humidity, and chloride-rich environments compared to 304 stainless
• 1/2-13 UNC Coarse Thread — Standard unified coarse thread for broad nut and hardware compatibility
• 4-Inch Length — Suitable for securing heavy-duty deck hardware, cleats, through-hull fittings, and structural components
• Hex Cap Head — Six-sided head for reliable torque application with standard wrenches or sockets
• Convenient 5-Pack Quantity — Pre-counted pack reduces waste and simplifies inventory for repair and installation jobs
• Non-Magnetic — 316 stainless is non-magnetic, reducing interference with onboard navigation instruments

These hex cap screws meet the demands of saltwater boating applications where standard zinc or 18-8 stainless fasteners may corrode prematurely. Ideal for boat builders, marine mechanics, and DIY boaters performing repairs or upgrades.