900pcs Metric Bolt Assortment Sets M6 M8 M10 M12 - Heavy Duty Kit

Our review of this 900pcs metric bolt assortment finds it best suited for DIYers, tradespeople and small workshops that need a broad selection of common metric fasteners in one organized kit. The single biggest reason to buy is the range: 18 sizes of bolts plus matching lock and flat washers in a sturdy plastic case deliver immediate versatility for machinery, furniture or vehicle repairs. The kit's use of 8.8 grade alloy steel and yellow zinc plating also provides real rust resistance for general-purpose tasks.

Key Features

• Comprehensive size range: Includes M6, M8, M10 and M12 bolts across 18 lengths to cover many common fastening needs without extra shopping.
• High strength material: Bolts and nuts are made from 8.8 grade alloy steel for reliable tensile strength in routine mechanical and structural use.
• Corrosion protection: Yellow zinc plated coating improves oxidation and rust resistance for longer service life in varied environments.
• Organized storage case: The sturdy plastic box with removable compartments keeps fasteners separated and simplifies finding the right part quickly.
• Vibration resistance: Uniform thread pitch and clear threading help reduce loosening in machinery and vehicle applications.
• Wide application scope: Useful for automotive, motorcycles, construction, 3D printers, electronics, furniture and general garage repairs.

Who It's For

This kit is ideal for hobbyists, home mechanics and small business technicians who regularly work on appliances, furniture, electronics or vehicles and want a ready supply of metric bolts and washers. The variety of M6 to M12 sizes covers most common fixes and projects without needing single-size purchases.

People who require certified high-performance fasteners for critical structural or heavy industrial use should look for specialized grades and traceable certification; likewise, those who need stainless steel or extremely high corrosion resistance in marine environments may prefer a different alloy.

Pros & Cons

Pros

• Large 900pcs count gives excellent value and a wide range of sizes for many projects.
• 8.8 grade alloy steel with yellow zinc plating offers a good balance of strength and corrosion resistance.
• Neat compartmented case makes storage and selection easy for fast workflow.
• Includes lock washers and flat washers for more secure fastening options.

Cons

• Case durability is mostly good but some users report the handle or box arriving cracked, so inspect on arrival.
• Not a stainless option; users needing maximum corrosion resistance should choose a different material.

Specifications

Total pieces	900 pcs
Bolt sizes included	M6, M8, M10, M12 across 18 lengths
Length ranges	M6 16/20/25/30/40/50mm, M8 16/20/25/30/40/50mm, M10 20/30/40/50mm, M12 30/50mm
Material grade	8.8 grade alloy steel
Coating	Yellow zinc plated
Packaging	Sturdy plastic case with removable compartments

Our Verdict

For its price and versatility this 900pcs metric bolt assortment is a practical value for DIYers and small shops that need fast access to common metric fasteners. The 18-size assortment, solid 8.8 alloy construction and organized case make it a smart everyday kit, though those needing stainless steel or certified structural fasteners should consider other options.

Frequently Asked Questions

Does the kit include washers?
Yes, the set provides matching lock washers and flat washers alongside the bolts and nuts for secure fittings.

Are the bolts corrosion resistant?
The bolts are yellow zinc plated which improves rust and oxidation resistance for general use, but they are not stainless steel.

Is the storage case durable?
The plastic case is sturdy with removable compartments for organization, though some buyers have reported occasional issues with the handle or box on arrival so inspect packaging on delivery.