National Marker N221713 Hook Bolt Stainless Steel 5/16x5 in

Product Description

The NATIONAL MARKER N221713 is a stainless steel hook bolt designed for marine and demanding outdoor environments where corrosion resistance is critical. Measuring 5/16 inches in diameter and 5 inches in length, this hook bolt ships with two stainless steel hex nuts included. The fastener is nonmagnetic and passivated, a secondary electrochemical treatment that enhances the passive oxide layer on the stainless steel surface for superior atmospheric corrosion resistance. A safe working load of 115 pounds makes it suitable for moderate anchoring and hanging tasks in corrosive or high-humidity settings. Installation is straightforward for any tradesperson who regularly works with marine hardware.

This hook bolt is suited for marine docks, piers, outdoor signage mounting, boat fixtures, and general exterior anchoring applications where standard carbon steel fasteners would corrode prematurely. The passivated stainless steel construction holds up in salt air, coastal environments, and other atmospheres with elevated moisture or chemical exposure. Each unit is sold individually and arrives with both hex nuts, making it ready for immediate installation without sourcing additional hardware.

Key Features

• 5/16-inch diameter by 5-inch length stainless steel hook bolt
• Two stainless steel hex nuts included per unit
• Nonmagnetic construction suitable for sensitive installations
• Passivated finish for enhanced atmospheric corrosion resistance
• 115-pound safe working load
• Designed for marine and outdoor applications

Compatibility

Designed as an OEM-style replacement or direct-use fastener for marine, coastal, and outdoor applications requiring 5/16-inch hook bolt hardware with hex nut retention.

Installation Notes

Install using standard hand tools appropriate for hex nut fasteners. Ensure the mounting substrate can support the rated 115-pound safe working load before installation. Always shut off or de-energize any adjacent electrical systems before working in proximity to wiring. Follow all applicable local building and marine codes when installing structural or load-bearing fasteners.

Technical Specifications

• Diameter: 5/16 inches
• Length: 5 inches
• Material: Stainless Steel
• Finish: Passivated
• Safe Working Load: 115 pounds
• Hardware Included: 2 Stainless Steel Hex Nuts
• Magnetic Properties: Nonmagnetic
• Weight: 0.141 pounds
• Sold As: Each

Standard Information

• Brand: NATIONAL MARKER
• Manufacturer Part Number: N221713