292 Pcs 304 Stainless Steel Bolts and Nuts Kit, A2 Hex Head Flange Nut and Bolt Set M6 M8 M10, with Flat and Lock Washers - HomeDIYer

Nuts and Bolts Assortment Kit, 262 Pcs 304 Stainless Steel Bolts and Nuts Kit, A2 Hex Head Nut and Bolt Set 1/4 - 20, 5/16 - 18, 3/8 - 16, with Flat and Lock Washers - HomeDIYer

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Stainless Steel Bolts and Nuts Assortment Kit 304 A2 Hex Head with Flat Lock Washers

Name: Stainless Steel Bolts and Nuts Assortment Kit 304 A2 Hex Head with Flat Lock Washers
Brand: HomeDIYer
Price: 36.69 USD
Availability: InStock
Rating: 5.0 (8 reviews)

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8 reviews

By HomeDIYer®

Options: Metric

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$36.69 USD $54.78 USD

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In stock (76 units), ready to be shipped

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Stainless Steel Bolts and Nuts Assortment Kit — Rust-Proof Fasteners for Every Project

When a loose bolt or missing nut stops your project cold, you need a kit that has every size on hand. Whether you're a weekend DIYer tackling deck repairs or a seasoned mechanic keeping equipment running, mismatched fasteners waste time and money. This kit puts an end to hardware store runs.

Available in two configurations: a 292-piece Metric set (M6 / M8 / M10) and a 262-piece SAE set (1/4-20 / 5/16-18 / 3/8-16). Every piece is machined from 304 stainless steel (A2 grade) — the same corrosion-resistant alloy trusted in marine, food-processing, and outdoor environments. Each kit ships in a clear, compartmentalized storage case with a bonus precision tweezers for handling small hardware.

From boat deck hardware and outdoor furniture assembly to HVAC brackets and automotive repairs, this stainless steel bolts and nuts assortment kit covers the fastener sizes you reach for most.

✅ Metric variant fits M6, M8, and M10 threaded applications. SAE variant fits 1/4-20, 5/16-18, and 3/8-16 UNC threaded applications.

Key Features

🔩 304 A2 Stainless Steel Construction — Resists rust, corrosion, and staining in wet, marine, and outdoor environments without surface coatings that can chip or peel.
📦 Comprehensive Assortment in One Box — 292 pieces (Metric) or 262 pieces (SAE) covering the most commonly used bolt lengths, nut sizes, flat washers, and lock washers in a single purchase.
🗂️ Organized Compartment Storage Case — Clear, labeled compartments keep every size separated and visible so you grab the right piece on the first try, every time.
🔧 Hex Head Design for Maximum Torque — Standard hex profile works with any wrench, socket, or ratchet you already own — no specialty tools required.
🛡️ Flat and Lock Washers Included — Flat washers distribute load; lock washers resist loosening from vibration — both included so your connections stay tight.
🎯 Bonus Precision Tweezers — Stainless steel tweezers included in every kit for placing small fasteners in tight spaces without fumbling.

What's in the Box

Metric Kit — 292 Pieces (M6 / M8 / M10)

M6×12 Hex Flange Bolts — 32 pcs
M6×16 Hex Flange Bolts — 8 pcs
M6×20 Hex Flange Bolts — 8 pcs
M6×25 Hex Flange Bolts — 6 pcs
M6×30 Hex Flange Bolts — 5 pcs
M6×16 Hex Bolts — 30 pcs
M8×20 Hex Bolts — 10 pcs
M8×25 Hex Bolts — 6 pcs
M8×30 Hex Bolts — 5 pcs
M10×30 Hex Bolts — 2 pcs
M6 Flat Washers — 40 pcs | M6 Lock Washers — 80 pcs
M8 Flat Washers — 33 pcs | M8 Lock Washers — 33 pcs
M10 Flat Washers — 2 pcs | M10 Lock Washers — 2 pcs
M6 Hex Nuts — 40 pcs | M8 Hex Nuts — 31 pcs | M10 Hex Nuts — 2 pcs
Precision Tweezers — 1 pc

SAE Kit — 262 Pieces (1/4-20 / 5/16-18 / 3/8-16)

1/4-20×3/4" Hex Bolts — 10 pcs | 1/4-20×1" — 10 pcs | 1/4-20×1-1/2" — 6 pcs | 1/4-20×2" — 35 pcs | 1/4-20×2" — 6 pcs
5/16-18×1/2" Hex Bolts — 25 pcs | 5/16-18×1/2" — 4 pcs | 5/16-18×3/4" — 10 pcs | 5/16-18×1" — 6 pcs | 5/16-18×2" — 4 pcs
3/8-16×2-1/2" Hex Bolts — 2 pcs | 3/8-16×1-1/2" — 4 pcs
1/4-20 Hex Nuts — 35 pcs | 5/16-18 Hex Nuts — 25 pcs | 3/8-16 Hex Nuts — 6 pcs
1/4-20 Flat & Lock Washers — 35 pcs | 5/16-18 Flat & Lock Washers — 25 pcs | 3/8-16 Flat & Lock Washers — 6 pcs
Precision Tweezers — 1 pc

Who Is This For

🔧 DIY Homeowners & Makers

Keep one kit in the garage and stop making hardware store trips mid-project. Deck repairs, fence posts, shelving brackets — this kit covers them all.

⚓ Marine & Outdoor Enthusiasts

304 stainless steel resists saltwater corrosion, making this kit ideal for boat hardware, dock fittings, and any outdoor installation exposed to moisture.

🚗 Automotive & Mechanical Technicians

Keep a kit in the shop for quick repairs and bracket installations. The organized case means no digging through loose hardware bins during a job.

🏭 Maintenance & Facilities Teams

Stock one kit per maintenance cart for HVAC, equipment, and facility repairs. The compartmentalized case makes restocking and inventory checks fast.

Technical Specifications

Material	304 Stainless Steel (A2 Grade)
Finish	Natural Stainless (Brushed)
Head Style	Hex Head
Thread Type — Metric	Metric Coarse (M6, M8, M10)
Thread Type — SAE	UNC (1/4-20, 5/16-18, 3/8-16)
Piece Count	292 pcs (Metric) / 262 pcs (SAE)
Included Hardware	Hex Bolts, Hex Nuts, Flat Washers, Lock Washers, Tweezers
Storage	Clear Compartmentalized Plastic Case
Weight	Approx. 1.3 kg (Metric) / 1.36 kg (SAE)
Corrosion Resistance	Suitable for marine, outdoor, and food-adjacent environments
Age Warning	Not suitable for children under 5 years — small parts

Frequently Asked Questions

What is the difference between the Metric and SAE variants?

The Metric variant contains 292 pieces in M6, M8, and M10 sizes using metric coarse thread. The SAE variant contains 262 pieces in 1/4-20, 5/16-18, and 3/8-16 sizes using UNC (Unified National Coarse) thread. Choose Metric for most international and European equipment; choose SAE for North American machinery and vehicles.

Are these bolts suitable for outdoor or marine use?

Yes. 304 stainless steel (A2 grade) offers strong resistance to rust and corrosion in wet, humid, and saltwater-adjacent environments. It is widely used in marine hardware, outdoor furniture, and coastal construction.

Do the lock washers prevent bolts from loosening under vibration?

Yes. The split lock washers included in this kit are designed to bite into both the fastener and the mating surface under torque, resisting loosening caused by vibration and dynamic loads.

What tools do I need to install these bolts?

A standard hex wrench, open-end wrench, or socket set is all you need. The hex head profile is compatible with any common hand tool or power tool socket. A precision tweezers is included in the kit for handling small pieces in tight spaces.

Can I use these bolts in food-processing or food-contact environments?

304 stainless steel is generally considered food-safe and is commonly used in food-processing equipment. However, for regulated food-contact applications, please verify compliance with your local food safety standards before use.

Are the bolt lengths consistent across all sizes in the kit?

Each size group includes multiple lengths. For example, the Metric kit includes M6 bolts ranging from 12 mm to 30 mm, and M8 bolts from 20 mm to 30 mm. Refer to the What's in the Box section above for the full breakdown by size and quantity.

Is the storage case reusable and durable?

Yes. The clear plastic compartment case is designed for repeated use. Each compartment is sized to hold its designated fastener type, making it easy to refill individual sizes as needed.

Ready to stop running out of the right fastener? Add this stainless steel bolts and nuts assortment kit to your cart and keep every project moving — no hardware store trip required.

Good set to keep in the garage

The bolts arrived a bit mixed up inside the case, but no matter, they seem high quality and it’s a great collection to keep handy for when you need a bolt-nut-washer set. No need to run to the hardware store for a single bolt. The case works great to keep everything together, but I’m not really sure what the included tweezers are for.

ThankS for lubrication

Yall do good job, could use a better plastic case that seals them all up, mine got scattered due to not mating lid to body.

This I did not expect.

I honestly ordered these thinking they’re just something to have on hand when you’re missing a bolt or a washer or a nut, and you need a spare, and of course, as is the case in the natural order of these things, it’s going to be inferior quality, but it’ll get the job done. I have kissed enough toads in the kingdom of fasteners to have fairly low expectations. But I can also recognize a prince when I see one. These are actually nice! These are “maybe I should build a workbench!“ level of inspiration. They’ve even included a cute little pair of tweezers for positioning, the lock washers, at least that’s what I assume therefore. I’m not even really sure. I’ve just got tweezers now. I love nice surprises. The box is a little tricky to re-fasten, but finesse it, don’t force it, and it will shut.

Great quality and value

I find that I'm constantly in need of a variety of bolt sizes in my shop both for the projects I'm working on and for little inventions I build to make my life easier and this set should work well. I specifically chose this set because it contains the sizes of bolts I use most often and that it is made from stainless steel that will be necessary for the things I build to use outdoors. The bolts in the set are machined very well with good threads and no burrs and attach to the bolts easily. I think the for the price and quality this set is a good value.

I liked this product.

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These o rings are a great for my ear tunnels

These o rings are a great for my ear tunnels, always loosing one here and there, I always have a new ones in the drawer. Being silicone, don't have any reactions compared to standard rubber ones I purchased at hardware stores, plus much less expensive. Purchased 16mm I'd to use on 19mm tunnels, and stay on great, might be able to get away with 17mm rings, but really happy with my choice.

Will never order from these folks again

I waited a long time and that’s all I received was the eyebolt with no threaded rod attached to it

Perfect they are really made well and I used them for my car

Perfect they are really made well and I used them for my car. The only thing I had a great for us. It took three weeks to get here. So shipping was slow.

did not include wing nuts

Hi Scott, thank you for your feedback. We're sorry for any inconvenience caused. Please get in touch with us directly, and we'll assist you. Thanks for shopping with HomeDIYer!

Haven't received the order yet! It's been over

Haven't received the order yet! It's been over 19 days!

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Stainless Steel Bolts and Nuts Assortment Kit 304 A2 Hex Head with Flat Lock Washers

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DIY Expert Support

Description

Stainless Steel Bolts and Nuts Assortment Kit — Rust-Proof Fasteners for Every Project

Key Features

What's in the Box

Who Is This For

Technical Specifications

Frequently Asked Questions

Stainless Steel Bolts and Nuts Assortment Kit 304 A2 Hex Head with Flat Lock Washers

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