Marine Fasteners RP-1337 Stainless Steel Lock Nut 3/8-16 (50-Pack)

Marine Fasteners RP-1337 is a pack of 50 3/8-16 lock nuts engineered for marine and saltwater environments where corrosion resistance and secure fastening are critical. Lock nuts feature a locking mechanism — typically a nylon insert or prevailing-torque design — that resists loosening caused by vibration, making them ideal for demanding on-water applications.

Key Features:

• Thread size: 3/8-16 (3/8 inch diameter, 16 threads per inch — UNC coarse thread)
• Quantity: 50 pieces per pack
• Locking design prevents loosening under vibration and dynamic load
• Suitable for marine, boating, and saltwater fastening applications
• Corrosion-resistant construction appropriate for harsh marine environments

The 3/8-16 thread specification is one of the most common coarse-thread sizes used in marine hardware assembly, rigging, and deck fittings. This 50-piece pack provides a convenient supply for boat builders, riggers, and maintenance crews who regularly need reliable locking fasteners on board.