740Pcs M6 M8 M10 M12 Metric Bolts and Nuts Kit - Heavy Duty Assortment

In this review the 740Pcs M6 M8 M10 M12 Metric Bolts and Nuts Kit is evaluated for hobbyists, home repairers and light industrial users who want a single, organized source of common metric fasteners. The kit's single biggest selling point is its breadth of sizes and the Grade 8.8 alloy steel construction, which gives a clear durability advantage for furniture, RV, automotive touchups and 3D printing fixtures. The included free universal socket tool and labeled storage case make it easy to select the right part quickly during a project.

Key Features

• Comprehensive assortment: Contains M6, M8, M10 and M12 bolts in multiple lengths so users can match bolts to a wide range of repair and assembly tasks.
• Grade 8.8 alloy steel: Bolts and nuts are made from Grade 8.8 material for stronger shear and tensile performance than basic hardware-grade fasteners.
• Yellow zinc plated coating: Provides improved corrosion resistance compared with untreated steel, suitable for many indoor and sheltered outdoor uses.
• Clear reusable storage case: Compartments are labeled so parts are easy to identify and access during work on furniture, appliances or machinery.
• Free universal socket tool: Adds immediate utility for tightening multiple head sizes without needing a full wrench set.

Who It's For

This kit is ideal for DIYers, makers and small workshop owners who need a ready supply of standard metric fasteners for furniture assembly, RV tweaks, light automotive tasks and fixtures for 3D printers. The variety of thread pitches and lengths covers most everyday repair and build scenarios without buying individual packs.

Professionals working on structural or high-specification projects should verify grade and coating requirements for their application; those needing stainless corrosion resistance for marine or continuous outdoor exposure may want a dedicated stainless set instead.

Pros & Cons

Pros

• Wide variety of sizes and thread pitches in one kit reduces downtime searching for parts.
• Grade 8.8 alloy steel offers solid strength for demanding fastener use.
• Storage case with labeled compartments improves organization and repeat use.
• Good overall value for someone who needs many sizes in one purchase.

Cons

• Yellow zinc plating is protective but not equivalent to marine-grade stainless for long-term outdoor exposure.
• Storage capacity received mixed feedback, so very large projects may require restocking.

Specifications

Contents	740 pieces of bolts, nuts and washers
Bolt sizes	M6, M8, M10, M12 with multiple lengths
Bolt lengths	M6 12/16/20/25/30mm; M8 16/20/25/30mm; M10 20/30/40mm; M12 30/40/50mm
Material	Grade 8.8 alloy steel
Finish	Yellow zinc plated coating
Included tool	Free universal socket tool
Packaging	Transparent reusable storage suitcase with labels

Our Verdict

The 740Pcs metric bolts and nuts kit is a practical, cost-effective solution for DIYers, workshop hobbyists and light tradespeople who want a broad set of common fasteners in one organized box. The Grade 8.8 alloy steel construction and labeled case make it a durable, convenient option for furniture assembly, appliance fixes and maker projects, while the zinc plating adds basic corrosion protection. Those needing stainless marine-grade parts should consider a stainless-specific set instead.

Frequently Asked Questions

Are the bolts corrosion resistant?
They use a yellow zinc plated coating that improves corrosion resistance over bare steel but is not equivalent to marine-grade stainless.

Does the kit include matching nuts and washers for each bolt?
Yes, the assortment includes matching nuts and both flat and lock washers for the M6, M8, M10 and M12 bolt sizes included.

Is the storage case reusable and labeled?
Yes, the kit ships in a sturdy transparent storage suitcase with labeled compartments for easy sorting and reuse.