Looking for the best 3/8 inch bolts for your projects? We’ve curated a selection of 10 top-quality bolts in stainless steel, zinc-plated steel, and Grade 8 hardened steel to meet all your heavy-duty, automotive, and DIY needs.
Looking for the best 3/8 inch bolts for your projects? You’re in the right place. Whether it’s for heavy-duty construction, automotive repairs, or DIY tasks, we’ve got you covered.
These bolts are strong, durable, and easy to use. They come in stainless steel, zinc-plated steel, and Grade 8 hardened steel to fit every need. Let’s dive in and find the perfect fit for your work.
List of Top 10 3/8 Inch Bolts
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BNUOK (8 Sets) 3/8-16 x 2 Hex Head Screw Bolt,Lock Nuts,Flat & Lock Washers Kits,304 Stainless Steel 18-8,Fully Threaded |
This BNUOK 3/8-16 Hex Bolt Kit is perfect for anyone who needs strong, rust-resistant fasteners for heavy-duty projects. Whether you’re working on home repairs, automotive parts, or industrial applications, these 304 stainless steel bolts with matching nuts and washers will keep everything secure and professional-looking. |
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3/8-16 x 3 Hex Bolts Set, 5 Sets 3/8″-16 Thread 3 Inches Long, Hexagon Bolt Nuts, Flat & Lock Washers, Stainless Steel 304 Right Hand Fully Thread Heavy Duty Hex Bolts Assortment Kit |
This 3/8-16 x 3 Hex Bolts Set is perfect for DIY enthusiasts, homeowners, and professionals who need reliable, corrosion-resistant fasteners for repairs, construction, or automotive projects. Its portable case keeps everything organized, making it ideal for quick fixes anywhere. |
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Vifmy 3/8-16 Bolt x (Length 3/4″, 1″, 1-1/4″, 1-1/2″) 304 Stainless Steel Flange Head Bolts Assortment Kit (112 Pack) with 3/8 16 Bolt, Serrated Flange Nuts, Washers, Full Thread |
This Vifmy Flange Bolts Kit is perfect for anyone who needs strong, durable fasteners for their projects. Whether you’re fixing machinery, building structures, or securing tires, this kit has you covered with its high-quality stainless steel and easy storage. |
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3/8-16 x 1 Hex Head Screw Bolt, 20Pcs 18-8 (304) Stainless Steel, Fully Threaded, Plain Finish, by SG TZH |
This product is perfect for builders, repair pros, and DIY fans who need strong, rust-resistant bolts for projects at home, in the shop, or on the job. It’s also great for anyone who wants long-lasting hardware that won’t fail. |
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Hard-To-Find Fastener Grade 8 Hex Cap Coarse Large Bolts, Bulk Pack, Steel Hex Bolts for Construction, Home Improvement, 3/8-16 x 2, Pack of 50 |
This pack is perfect for builders, mechanics, and DIY pros who need strong, heavy-duty bolts that can handle tough jobs with ease. If you want secure fastening that lasts, these bolts are made for you. |
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Yinpecly 5 Sets 3/8-16×4 Hex Head Screw Bolt, Nuts, Flat & Lock Washers, Stainless Steel 304, Machine Fully Thread Hex Bolts, Bright Finish Hexagon Bolt, Nuts and Bolts Assortment Kit |
This Yinpecly 5 Sets Hex Bolt Kit is perfect for anyone who needs strong, long-lasting fasteners. It’s great for projects in agriculture, automobiles, or construction, especially in wet or wood environments. |
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Prime-Line 9059752 Hex Bolts, 3/8 in.-16 X 2-1/2 in., A307 Grade A Zinc Plated Steel (25 Pack) |
This pack is perfect for builders, DIY fans, and mechanics who need strong, reliable fasteners. If you want bolts that are versatile, easy to use, and meet ASME and ASTM standards, these are made for you. |
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Hard to Find Fastener Tap Hex Bolts, Durable Corrosion-Resistant Steel Hex Head Bolt for Home Improvement, DIY, Construction, 3/8-16 x 1-1/2, Pack of 100 |
These Hard to Find Fastener Tap Hex Bolts are perfect for DIY enthusiasts, homeowners, and professionals working on home improvement, construction, or automotive projects. They’re ideal for anyone needing durable, corrosion-resistant bolts for lighter-duty applications. |
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Krysay 11Pcs 3/8-16 x 2 Hex Head Screw Bolt,304 Stainless Steel 18-8,External Hex Drive,Fully Threaded. |
Perfect for DIY enthusiasts, contractors, and professionals, these 3/8-16 hex head screw bolts are ideal for anyone needing reliable, corrosion-resistant fasteners. Whether for indoor or outdoor projects, they’re great for construction, machinery, or automotive work. |
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Hard-to-Find Fastener Zinc Coarse Thread Grade 2/A307 Hex Bolts, Durable & Versatile Stainless Steel Hex Bolts for Machinery, Automotive, Construction, 3/8-16 x 3/4, Pack of 100 |
These zinc-plated hex bolts are perfect for anyone needing reliable, durable fasteners for light to medium-duty projects. Whether you’re a shop owner, contractor, or part of a maintenance crew, these bolts are ideal for machinery, automotive, and construction tasks where secure fastening and corrosion resistance matter. |
Detailed Reviews
Here are the Best 3/8 Inch Bolts you can buy today. Each option is backed by expert analysis and customer feedback. We highlight the top features and real performance so you know what works best. Read on to find the perfect bolt kit for your project.
1. BNUOK (8 Sets) 3/8-16 x 2 Hex Head Screw Bolt,Lock Nuts,Flat & Lock Washers Kits,304 Stainless Steel 18-8,Fully Threaded
BNUOK’s 8-set bolt kit includes 3/8-16 x 2-inch hex head screws, lock nuts, and flat & lock washers. Each piece has a bright finish and smooth threads for a professional look.
Made from 304 stainless steel, these bolts resist rust and wear. The nylon-insert lock nuts prevent loosening under vibration or torque. Perfect for heavy-duty projects.
Use them for mechanical repairs, automotive parts, or home fixes. Each set includes 1 bolt, 1 nut, and 2 washers. Simple, strong, and reliable.
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Perfect For:
This BNUOK 3/8-16 Hex Bolt Kit is perfect for anyone who needs strong, rust-resistant fasteners for heavy-duty projects. Whether you’re working on home repairs, automotive parts, or industrial applications, these 304 stainless steel bolts with matching nuts and washers will keep everything secure and professional-looking.
Ready to Purchase?
2. 3/8-16 x 3 Hex Bolts Set, 5 Sets 3/8″-16 Thread 3 Inches Long, Hexagon Bolt Nuts, Flat & Lock Washers, Stainless Steel 304 Right Hand Fully Thread Heavy Duty Hex Bolts Assortment Kit
This 3/8-16 x 3 Hex Bolts Set is a versatile kit for all your fastening needs. It includes 5 sets of bolts, nuts, flat washers, and lock washers, all made of premium 304 stainless steel. Perfect for repairs, construction, and DIY projects.
The corrosion-resistant stainless steel ensures durability for indoor and outdoor use. Each bolt is fully threaded and can be trimmed to your desired length. The deep threads and lock washers provide secure fastening to prevent loosening.
Portable case keeps everything organized. Easy to carry for toolbox or job site. All-in-one solution for fastening tasks.
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Perfect For:
This 3/8-16 x 3 Hex Bolts Set is perfect for DIY enthusiasts, homeowners, and professionals who need reliable, corrosion-resistant fasteners for repairs, construction, or automotive projects. Its portable case keeps everything organized, making it ideal for quick fixes anywhere.
Ready to Purchase?
3. Vifmy 3/8-16 Bolt x (Length 3/4″, 1″, 1-1/4″, 1-1/2″) 304 Stainless Steel Flange Head Bolts Assortment Kit (112 Pack) with 3/8 16 Bolt, Serrated Flange Nuts, Washers, Full Thread
The Vifmy 3/8-16 Bolt set is made from 304 stainless steel. It gives strong, long‑lasting support.
It comes with 4 bolt lengths: 3/4″, 1″, 1‑1/4″, 1‑1/2″. The set includes washers, spring washers, and flange nuts. All parts fit together perfectly.
The kit fits many jobs, from machinery to building. Keep them in the clear case for quick access.
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Perfect For:
This Vifmy Flange Bolts Kit is perfect for anyone who needs strong, durable fasteners for their projects. Whether you’re fixing machinery, building structures, or securing tires, this kit has you covered with its high-quality stainless steel and easy storage.
Ready to Purchase?
4. 3/8-16 x 1 Hex Head Screw Bolt, 20Pcs 18-8 (304) Stainless Steel, Fully Threaded, Plain Finish, by SG TZH
These hex head screw bolts are strong. They are made of 304 stainless steel. They resist rust and damage.
You get 20 pieces in one pack. They are easy to use anywhere.
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Perfect For:
This product is perfect for builders, repair pros, and DIY fans who need strong, rust-resistant bolts for projects at home, in the shop, or on the job. It’s also great for anyone who wants long-lasting hardware that won’t fail.
Ready to Purchase?
5. Hard-To-Find Fastener Grade 8 Hex Cap Coarse Large Bolts, Bulk Pack, Steel Hex Bolts for Construction, Home Improvement, 3/8-16 x 2, Pack of 50
Hard-To-Find Fastener Grade 8 Hex Cap Coarse Large Bolts are built tough. Made from Grade 8 hardened steel, they handle heavy-duty jobs. Perfect for construction and home improvement.
These steel hex bolts have coarse threads for a stronger grip. The hex cap design lets you apply more torque. Ideal for automotive and industrial projects.
Each bolt is 3/8″ in diameter and 2 inches long. The yellow zinc finish resists rust and corrosion. Comes in a pack of 50 for bulk use.
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Perfect For:
This pack is perfect for builders, mechanics, and DIY pros who need strong, heavy-duty bolts that can handle tough jobs with ease. If you want secure fastening that lasts, these bolts are made for you.
Ready to Purchase?
6. Yinpecly 5 Sets 3/8-16×4 Hex Head Screw Bolt, Nuts, Flat & Lock Washers, Stainless Steel 304, Machine Fully Thread Hex Bolts, Bright Finish Hexagon Bolt, Nuts and Bolts Assortment Kit
This bolt and nut kit is made of strong 304 stainless steel. It has a hex head design with full threading. The size is larger, making it perfect for heavy-duty fastening.
Each set includes 3/8-16×4″ hex bolts, 3/8″-16 nuts, flat washers, and spring lock washers. The parts resist corrosion, stay firm, and last long. They are built for tough jobs in wet or wood environments.
You get 5 complete sets in one package. Strong, reliable, and ready for work.
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Perfect For:
This Yinpecly 5 Sets Hex Bolt Kit is perfect for anyone who needs strong, long-lasting fasteners. It’s great for projects in agriculture, automobiles, or construction, especially in wet or wood environments.
Ready to Purchase?
7. Prime-Line 9059752 Hex Bolts, 3/8 in.-16 X 2-1/2 in., A307 Grade A Zinc Plated Steel (25 Pack)
Prime-Line 9059752 Hex Bolts are strong and reliable. They come in a pack of 25, ready for your projects.
These bolts are 3/8 inch-16 X 2-1/2 inch, a common size for many uses. They work with nuts or threaded holes of the same size.
Zinc-plated steel resists rust. ASME and ASTM approved for quality. Nuts and washers sold separately.
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Perfect For:
This pack is perfect for builders, DIY fans, and mechanics who need strong, reliable fasteners. If you want bolts that are versatile, easy to use, and meet ASME and ASTM standards, these are made for you.
Ready to Purchase?
8. Hard to Find Fastener Tap Hex Bolts, Durable Corrosion-Resistant Steel Hex Head Bolt for Home Improvement, DIY, Construction, 3/8-16 x 1-1/2, Pack of 100
These Hard to Find Fastener Tap Hex Bolts are perfect for home improvement, DIY, and construction projects. They are made of durable, corrosion-resistant steel with a zinc-plated finish, making them ideal for indoor and light outdoor use.
The full thread design provides secure fastening in tapped holes and joints, while the A307 grade strength ensures reliable performance for general-purpose applications. The hex head configuration allows for easy installation with standard wrenches or sockets.
3/8-16 diameter, 1-1/2 inch length, pack of 100. Steel material, zinc finish, hex head style.
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Perfect For:
These Hard to Find Fastener Tap Hex Bolts are perfect for DIY enthusiasts, homeowners, and professionals working on home improvement, construction, or automotive projects. They’re ideal for anyone needing durable, corrosion-resistant bolts for lighter-duty applications.
Ready to Purchase?
9. Krysay 11Pcs 3/8-16 x 2 Hex Head Screw Bolt,304 Stainless Steel 18-8,External Hex Drive,Fully Threaded.
The Krysay 11Pcs Hex Head Screw Bolt set is perfect for strong and reliable fastening. Each bolt measures 3/8-16 x 2 inches and has clean, smooth threads. They are fully threaded for maximum grip.
Made from 304 stainless steel, these bolts resist rust and corrosion. They work well indoors and outdoors. The hexagonal head ensures a secure grip with standard wrenches.
This set includes 11 bolts in total. They are ideal for construction, machinery, and automotive systems. Use them to fasten metal frames, piping, and equipment with ease.
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Perfect For:
Perfect for DIY enthusiasts, contractors, and professionals, these 3/8-16 hex head screw bolts are ideal for anyone needing reliable, corrosion-resistant fasteners. Whether for indoor or outdoor projects, they’re great for construction, machinery, or automotive work.
Ready to Purchase?
10. Hard-to-Find Fastener Zinc Coarse Thread Grade 2/A307 Hex Bolts, Durable & Versatile Stainless Steel Hex Bolts for Machinery, Automotive, Construction, 3/8-16 x 3/4, Pack of 100
Hard-to-Find Fastener Zinc Coarse Thread Hex Bolts are durable and versatile. They are perfect for machinery, automotive, and construction. The zinc finish resists rust and looks clean.
These bolts have a full thread design for secure fastening. They meet ASTM A307 standards for reliable strength. Ideal for indoor and light outdoor use.
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Perfect For:
These zinc-plated hex bolts are perfect for anyone needing reliable, durable fasteners for light to medium-duty projects. Whether you’re a shop owner, contractor, or part of a maintenance crew, these bolts are ideal for machinery, automotive, and construction tasks where secure fastening and corrosion resistance matter.
Ready to Purchase?
Buying Guide
Need 3/8 inch bolts? We’ve got you covered. Find the perfect fit for your project with our easy guide.
Buying 3/8 Inch Bolts: A Simple Guide
Choosing the right bolts is key to a strong and lasting project. Here’s what to look for:
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Material:
Pick stainless steel for rust resistance, zinc-plated steel for budget-friendly options, or Grade 8 hardened steel for heavy-duty tasks. -
Length:
Match the bolt length to your project needs. Common sizes include 2 inches, 3 inches, and 4 inches. -
Thread Type:
Choose coarse threads for stronger grip or fine threads for precision. Ensure they fit your nuts or threaded holes. -
Finish:
A bright finish looks professional, while zinc plating adds rust protection. Pick based on your project’s environment. -
Kit or Bulk:
Kits include bolts, nuts, and washers for convenience. Bulk packs save money for large projects. -
Durability:
Look for corrosion-resistant bolts for outdoor use. Grade 8 bolts handle heavy loads best. -
Ease of Use:
Hex heads work well with standard tools. Fully threaded bolts offer more grip and can be trimmed.
Find the right bolts, and your project will be strong and reliable. Happy building!