Stainless Steel Bolts and Nuts Assortment Kit 304 A2 Hex Head with Flat Lock Washers
Metric
$36.69 USD
Sale price
$36.69 USD
Regular price
$54.78 USD
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Stainless Steel Bolts and Nuts Assortment Kit 304 A2 Hex Head with Flat Lock Washers
$36.69 USD
Sale price
$36.69 USD
Regular price
$54.78 USD
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.