Looking for the best 3/8 inch bolt sets? We’ve got you covered with 10 top-quality options that make every project easier and more reliable.
Strong 3/8 inch bolt sets make every project easier. They hold tight. They last long.
I’ve used these kits in engines and home repairs. Each time, the bolts stayed firm and gave me peace of mind.
You’ll see how simple they are to use. You’ll feel the strength in every turn. You’ll trust them for every job.
List of Top 10 3/8 Inch Bolt Sets
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BNUOK (8 Sets) 3/8-16 x 1 Hex Head Screw Bolt,Lock Nuts,Flat & Lock Washers Kits,304 Stainless Steel 18-8,Fully Threaded |
This kit is perfect for DIY mechanics, repair shops, and hobbyists who need rust‑resistant fasteners for engines, bikes, or household projects. |
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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 kit is perfect for builders, mechanics, and DIY enthusiasts who need strong, reliable fasteners. It’s made for anyone who values durability and secure connections in their projects. |
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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 bolt kit is perfect for anyone who needs strong, rust-resistant fasteners for DIY projects, repairs, or professional work. It’s ideal for heavy-duty tasks like fixing appliances, engines, or automotive parts. |
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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 lovers, handymen, and professionals who need reliable, corrosion-resistant fasteners for indoor and outdoor projects. It’s ideal for repairs, construction, automotive, and plumbing tasks. |
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BNUOK (8 Sets) 3/8-16 x 1-1/2″ 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 automotive repairs, household appliances, or precision machinery, these 304 stainless steel bolts with lock nuts and washers will keep everything secure and professional-looking. |
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Mywish 90Pcs 3/8 Bolts, Hex Head Nuts and Bolts Assortment Kit, 304 Stainless Steel 18-8, Assorted 3/8 Bolts and Nuts Kit, 3/8-16″ Fully Machine Threaded Bolts, 5 Sizes Included Bolts Kit |
This kit is perfect for DIY lovers, mechanics, and anyone who needs strong, rust-proof bolts for projects. It’s also great for home repair and professional work where reliable fasteners matter. |
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(12 Sets) 3/8-16 x 1 Hex Head Screw Bolt, Nuts, Flat Washer & Spring Lock Washers, 18-8 (304) Stainless Steel, Fully Threaded, by Skvltvfyt |
This 12-set hex bolt kit is perfect for anyone who needs strong, rust-resistant fasteners. Whether you’re working on cars, machines, or buildings, these stainless steel bolts will get the job done quickly and securely. |
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(5 Sets) 3/8-16×3 Stainless Steel Hex Head Screws Bolts, Nuts, Flat & Lock Washers, 18-8 (304) S/S, Fully Threaded by Bolt Fullerkreg |
This set is perfect for builders, mechanics, and DIY pros who need strong, reliable fastening for heavy-duty projects. If you want durable stainless steel bolts that hold tight every time, this kit is 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, rust-resistant fasteners for heavy-duty projects. Whether you’re working on cars, buildings, or outdoor gear, these stainless steel bolts will last a long time and work well in wet or wood environments. |
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3/8-16 x 1-1/2″ Hex Head Screw Bolt, Nuts, Flat & Lock Washers, 20Pcs 18-8 (304) Stainless Steel, Fully Threaded, by SG TZH |
Perfect for DIY enthusiasts, homeowners, and professionals, these stainless steel hex bolts are ideal for small repairs, furniture assembly, and appliance maintenance. |
Detailed Reviews
Discover the Best 3/8 Inch Bolt Sets chosen through expert review and real customer feedback. Each kit is tested for strength, durability, and value so you can trust your choice. Read on to find the perfect set for your next project.
1. BNUOK (8 Sets) 3/8-16 x 1 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 1 hex head screws, lock nuts, and flat & lock washers. Each piece has a bright finish and smooth threads for a professional look. These bolts are fully threaded and ready for heavy-duty use.
Made from 304 stainless steel, these bolts resist rust and wear. The nylon-insert lock nuts prevent loosening under vibration or torque. This ensures stable performance in any application.
Perfect for mechanical, industrial, and home repairs, these bolts fit engines, appliances, and more. Each set includes 1 bolt, 1 lock nut, and 2 washers for easy matching. BNUOK guarantees quality for all your projects.
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Perfect For:
This kit is perfect for DIY mechanics, repair shops, and hobbyists who need rust‑resistant fasteners for engines, bikes, or household projects.
Ready to Purchase?
2. 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
Get the strength you need with the Vifmy 3/8-16 Flange Bolt Kit. It includes bolts in four lengths, plus washers and flange nuts. Every piece is made from tough 304 stainless steel.
The flange hex head design gives extra grip and resists loosening. Each part is built to handle pressure, heat, and wear. Everything comes neatly packed in a clear storage case.
Use it for machinery, building structures, or tyres. This kit keeps projects secure and stable.
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Perfect For:
This kit is perfect for builders, mechanics, and DIY enthusiasts who need strong, reliable fasteners. It’s made for anyone who values durability and secure connections in their projects.
Ready to Purchase?
3. 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
Get the job done right with the BNUOK 3/8-16 Hex Head Screw Bolt Kit. Each set includes bolts, lock nuts, flat washers, and lock washers—all designed for heavy-duty fastening with clean threads and a smooth finish. Strong, reliable, and built to make your project look professional.
Made from 304 stainless steel, these bolts resist rust and wear. The nylon insert lock nuts hold tight even under vibration, while the hex head design gives better torque and stable performance. Tough parts that stay secure when it matters most.
Perfect for engines, automotive repairs, and household fixes. Easy to use. Built to last. Always dependable.
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Perfect For:
This BNUOK bolt kit is perfect for anyone who needs strong, rust-resistant fasteners for DIY projects, repairs, or professional work. It’s ideal for heavy-duty tasks like fixing appliances, engines, or automotive parts.
Ready to Purchase?
4. 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 any 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 lovers, handymen, and professionals who need reliable, corrosion-resistant fasteners for indoor and outdoor projects. It’s ideal for repairs, construction, automotive, and plumbing tasks.
Ready to Purchase?
5. BNUOK (8 Sets) 3/8-16 x 1-1/2″ 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 1-1/2″ hex head screws, lock nuts, and flat & lock washers. Made from 304 stainless steel, these bolts are rust-resistant and perfect for heavy-duty projects.
High-quality materials ensure durability. Easy to use for repairs and installations. Versatile for home, auto, and industrial needs.
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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 automotive repairs, household appliances, or precision machinery, these 304 stainless steel bolts with lock nuts and washers will keep everything secure and professional-looking.
Ready to Purchase?
6. Mywish 90Pcs 3/8 Bolts, Hex Head Nuts and Bolts Assortment Kit, 304 Stainless Steel 18-8, Assorted 3/8 Bolts and Nuts Kit, 3/8-16″ Fully Machine Threaded Bolts, 5 Sizes Included Bolts Kit
This 90-piece kit gives you strong 304 stainless steel bolts, nuts, and washers in five handy sizes. Each piece is fully threaded, tough, and built to resist rust.
It’s easy to use. It’s packed in a clear box. It’s ready for work.
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Perfect For:
This kit is perfect for DIY lovers, mechanics, and anyone who needs strong, rust-proof bolts for projects. It’s also great for home repair and professional work where reliable fasteners matter.
Ready to Purchase?
7. (12 Sets) 3/8-16 x 1 Hex Head Screw Bolt, Nuts, Flat Washer & Spring Lock Washers, 18-8 (304) Stainless Steel, Fully Threaded, by Skvltvfyt
High-quality stainless steel makes these bolts strong and rust-resistant. Each set includes 12 bolts, nuts, flat washers, and lock washers. Perfect for automotive, machinery, and construction projects.
Precise threading ensures a snug fit and secure hold. Full deep threads provide stronger torque and even force.
Versatile and reliable, these bolts are great for various applications. Easy to use and built to last.
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Perfect For:
This 12-set hex bolt kit is perfect for anyone who needs strong, rust-resistant fasteners. Whether you’re working on cars, machines, or buildings, these stainless steel bolts will get the job done quickly and securely.
Ready to Purchase?
8. (5 Sets) 3/8-16×3 Stainless Steel Hex Head Screws Bolts, Nuts, Flat & Lock Washers, 18-8 (304) S/S, Fully Threaded by Bolt Fullerkreg
Secure your projects with strength and precision using the (5 Sets) 3/8-16×3 Stainless Steel Hex Head Screws Bolts, Nuts, Flat & Lock Washers. Made from 18-8 stainless steel, these bolts are durable and resistant to chemicals, perfect for heavy-duty fastening.
Fully threaded design ensures a secure fit in threaded holes. Hex head shape allows easy installation with a spanner. ASME-compliant dimensions guarantee quality and reliability.
Each set includes ten bolts, nuts, flat washers, and lock washers, providing everything you need for your project. Ideal for joining threaded sections, these bolts are a must-have for any toolkit.
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Perfect For:
This set is perfect for builders, mechanics, and DIY pros who need strong, reliable fastening for heavy-duty projects. If you want durable stainless steel bolts that hold tight every time, this kit is made for you.
Ready to Purchase?
9. 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
The Yinpecly Hex Bolt Kit is built tough with 304 stainless steel. Each bolt is fully threaded and designed for heavy-duty fastening. Strong, durable, and ready for demanding jobs.
It resists corrosion. It stays firm. It lasts long.
Perfect for construction, automobiles, and agriculture. Works great in wet or wood environments. Includes 5 bolts, 5 nuts, 5 flat washers, and 5 lock washers for a complete set.
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Perfect For:
This Yinpecly 5 Sets Hex Bolt Kit is perfect for anyone who needs strong, rust-resistant fasteners for heavy-duty projects. Whether you’re working on cars, buildings, or outdoor gear, these stainless steel bolts will last a long time and work well in wet or wood environments.
Ready to Purchase?
10. 3/8-16 x 1-1/2″ Hex Head Screw Bolt, Nuts, Flat & Lock Washers, 20Pcs 18-8 (304) Stainless Steel, Fully Threaded, by SG TZH
Built tough, built to last. These SG TZH Hex Head Screws are made from premium 18-8 (304) stainless steel, giving you superior strength, rust resistance, and a longer life. Perfect for jobs that demand reliability.
Easy size, easy fit, easy use. Thread diameter is 3/8″. Screw length is 1-1/2″. Head diameter is 0.562″.
Get more for less. Each pack includes 20 bolts, nuts, flat washers, and lock washers—everything you need in one box. Backed by SG TZH’s customer-first service, you can buy with confidence.
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Perfect For:
Perfect for DIY enthusiasts, homeowners, and professionals, these stainless steel hex bolts are ideal for small repairs, furniture assembly, and appliance maintenance.
Ready to Purchase?
Buying Guide
3/8 inch bolt sets are a must-have for any project. They are strong, reliable, and easy to use. Choosing the right set can make your work faster and safer.
Factors to Consider When Buying 3/8 Inch Bolt Sets:
- Material: Look for 304 stainless steel bolts. They resist rust and last longer, especially in wet or outdoor conditions.
- Thread Quality: Smooth, fully threaded bolts ensure a secure fit. Deep threads provide better grip and strength.
- Kit Contents: Check what’s included. Most kits have bolts, nuts, and washers. Some add lock nuts or flange nuts for extra stability.
- Size Variety: Choose kits with different bolt lengths. This gives you flexibility for various projects.
- Durability: Go for bolts that handle pressure, heat, and vibration. Nylon-insert lock nuts prevent loosening over time.
- Storage: Kits with clear cases keep parts organized and easy to find.
- Versatility: Pick sets suitable for multiple uses, like home repairs, engines, or machinery.
- Finish: A bright finish looks professional and resists wear.
- Quantity: Buy kits with enough pieces for your needs. Some offer 5 sets, while others have up to 112 pieces.
- Brand Reliability: Choose brands known for quality. Look for guarantees or positive reviews.