Grade 8 Coarse Hex Cap Screws 3/8-16 x 2 in - Durable Steel Fasteners

In this review the focus is on a practical pack of hardware: Grade 8 coarse hex cap screws, 3/8-16 x 2 in, sold in a 50-piece set. The bottom line is simple: these are heavy-duty steel bolts with a yellow zinc finish that suit repair and build projects where strength and corrosion resistance matter. For anyone who needs reliable hex head fasteners that fit a 9/16 wrench and hold up under load, this pack offers a clear value proposition without unnecessary extras.

Key Features

• Grade 8 steel: provides high tensile strength and is appropriate where tougher, heat-treated fasteners are required.
• 3/8 in diameter: a common size that fits many structural and mechanical connections for general-purpose use.
• 2 in length: long enough for many flange and bracket assemblies while remaining a standard, easy-to-source length.
• Yellow zinc finish: gives added rust resistance compared with bare steel and helps the bolts last longer in damp environments.
• Hex head (9/16 wrench): offers a secure driving surface for hand or socket tools and consistent torque application.
• 50-piece pack: provides a convenient quantity for larger repair jobs or to keep a working stock on hand.

Who It's For

These bolts suit homeowners, mechanics, and light industrial users who need a dependable, high-strength fastener for repairs, equipment assembly, or farm use. The combination of grade 8 steel and a yellow zinc finish makes them a good option where strength and moderate corrosion resistance are both priorities.

Users who need stainless steel corrosion performance, specialty coatings, or non-structural low-carbon bolts may want to look elsewhere. Also, anyone working in applications where a certified engineer specifies alternate materials or finishes should confirm suitability before relying on these fasteners.

Pros & Cons

Pros

• High tensile strength from grade 8 steel, suitable for demanding connections.
• Yellow zinc finish offers improved rust resistance over plain steel in many environments.
• Good value and fit: customers report the length and fit meet expectations for common uses.
• Pack of 50 keeps a steady supply on hand for multiple projects.

Cons

• Yellow zinc is not as corrosion resistant as stainless steel for marine or highly corrosive environments.

Specifications

Diameter	3/8 in
Thread	3/8-16 coarse
Length	2 in
Material	Steel (grade 8)
Finish	Yellow zinc
Head style	Hex (fits 9/16 wrench)
Quantity	50 pieces

Our Verdict

These Grade 8 hex cap screws are a practical choice for anyone who needs high-strength fasteners in common sizes. They deliver durability, consistent fit, and better-than-bare-steel corrosion resistance at a reasonable price, making the 50-piece pack good value for home, farm, and many shop applications.

Frequently Asked Questions

Are these bolts suitable for outdoor use?
Yes, the yellow zinc plating provides increased rust resistance for general outdoor use, but stainless steel is preferable for marine conditions.

What wrench size fits the head?
The hex head is sized to work with a 9/16 wrench or corresponding socket for torque application.

Do these bolts come with matching nuts?
The pack includes only screws; matching nuts and washers should be sourced separately to suit your application.