Marine Fasteners RP-100 Hex Cap Screw 3/8-16 x 1-1/2 in. Stainless Steel 25-Pack

The Marine Fasteners RP-100 is a 3/8-16 x 1-1/2 inch hex head cap screw sold in a convenient 25-piece pack, purpose-built for demanding marine and saltwater environments. Featuring a standard UNC (Unified National Coarse) thread pitch of 16 threads per inch and a 9/16 inch hex drive head, these fasteners are designed for use with a wrench, socket, or impact driver for secure, high-torque installation.

Key Features:

• Size: 3/8-16 x 1-1/2 in. (diameter-thread pitch x length under head)
• Thread: 3/8 inch diameter, 16 TPI UNC coarse thread
• Head Style: Hex head with washer face for even load distribution
• Drive: 9/16 in. hex — compatible with standard wrenches, sockets, and ratchets
• Pack Quantity: 25 pieces
• Application: Marine, coastal, and saltwater-exposed structures and equipment

Stainless steel hex cap screws are the preferred fastener for boats, docks, marine hardware, and any application where prolonged exposure to moisture, humidity, or saltwater is expected. The hex head design provides a flat bearing surface and high torque capacity, making installation straightforward with common hand tools. Sold in a 25-piece pack, the RP-100 is ideal for both single-use repairs and keeping aboard as part of a marine maintenance supply kit.