Description
Product Description
Secure your marine, automotive, and heavy-duty projects with confidence using Hardline Products® Premium Grade 5 Hex Bolts. Engineered for high-stress applications, this 50-piece fastening kit provides the superior strength and corrosion resistance required for reliable, long-term performance.
Each bolt is precision-manufactured from quenched and tempered steel, achieving the Grade 5 specification necessary for critical structural connections. Finished with a durable zinc plating, these fasteners are built to withstand harsh environments, resisting rust and oxidation better than standard untreated hardware. The included Nyloc nylon-insert lock nuts ensure a vibration-proof hold, making this set ideal for powersports (ATV/UTV), marine engine mounting, and chassis work where fastening security is paramount.
Key Features & Benefits
- High-Tensile Grade 5 Strength: Quenched and tempered carbon steel construction offers significantly higher yield strength than standard Grade 2 hardware, preventing shearing and snapping under load.
- Superior Corrosion Resistance: A protective Zinc coating shields the steel core from moisture and oxidation, extending the lifespan of your assembly—essential for outdoor and marine environments.
- Vibration-Proof Security: Includes matching Nyloc nuts that utilize a nylon collar to grip the bolt threads, preventing loosening caused by engine vibration or rough terrain.
- Precision Engineering: Features a 6-sided hex head for a non-slip grip with standard socket wrenches, ensuring maximum torque application during installation.
- Ready-to-Use Bulk Pack: Sold in convenient bags of 50 bolt/nut pairs, perfect for stocking your workshop or completing large-scale builds without multiple trips to the hardware store.
Technical Specifications
- Material: Grade 5 Carbon Steel
- Finish: Zinc Plated (Corrosion Resistant)
- Diameter: 3/8 Inch
- Length: 2.5 Inches
- Thread Type: Coarse Thread (Partially Threaded Shank)
- Head Style: Hexagon (requires 1/2″ socket or wrench)
- Included Hardware: 50 Hex Bolts and 50 Nyloc Lock Nuts
- UPC: 632194729445
Editor’s Note on Thread Pitch
The original listing indicates a specification of “3/8-18”. Please note that the standard industry “Coarse” thread for a 3/8″ bolt is 16 TPI (Threads Per Inch), while 24 TPI is standard “Fine”. The “18” TPI specification is highly unusual for a 3/8″ hex bolt (though standard for 5/16″ bolts). If this is a specialized non-standard part, please retain the “18” designation. If this is a standard coarse bolt, we recommend updating the title to 3/8-16 to prevent customer confusion.
