919 Pcs Grade 8.8 Metric Bolt Assortment M4 M5 M6 M8 - Heavy Duty Kit

In this review of the 919 Pcs Grade 8.8 Metric Bolt Assortment, the bottom line is simple: this kit is for anyone who needs a comprehensive, heavy duty selection of metric bolts, nuts and washers in a single, organized box. The reviewer found it especially useful for small machinery repairs, furniture assembly, and motorcycle or car maintenance because the Grade 8.8 alloy steel parts offer good hardness and corrosion resistance. The kit's clear advantage is the breadth of sizes and the tidy double-sided storage box that keeps components accessible when working on varied projects.

Key Features

• Metric sizes included: The kit supplies M4, M5, M6 and M8 sets so common metric fasteners are on hand for most household and workshop jobs.
• Large assortment: With 919 pieces and 225 sets of bolts, nuts and washers, users can replace or match fasteners without running back to the hardware store.
• Grade 8.8 alloy steel: The higher hardness and wear resistance make these fasteners suitable for heavier duty applications than generic mild-steel sets.
• Yellow zinc plating: Provides corrosion resistance that helps components hold up in indoor or occasional outdoor use.
• Handy packing: A double-sided storage box with dividers and a thickened latch keeps the assortment neat and makes items easy to locate during projects.

Who It's For

This kit is aimed at DIYers, mechanics, and small shop owners who work on furniture, automotive or motorcycle repairs and want a ready supply of common metric fasteners. It is particularly useful for people who value a wide selection and durable Grade 8.8 hardware for projects that demand stronger bolts than basic consumer-grade sets.

Those who should look elsewhere include specialists needing uncommon metric threads, custom lengths outside the 12-30mm range, or stainless steel fasteners for long-term outdoor exposure in marine environments. For routine indoor tasks and general repair work, however, this collection is well matched to the need.

Pros & Cons

Pros

• Comprehensive mix of M4, M5, M6 and M8 sizes provides flexibility across many repair tasks.
• Grade 8.8 alloy steel adds strength and wear resistance compared with lower-grade kits.
• Yellow zinc plating improves corrosion resistance for broader indoor/outdoor use.
• Sturdy double-sided storage box keeps parts organized and easy to access.

Cons

• Lengths are limited to the 12-30mm range, so longer fasteners are not included.
• Yellow zinc is protective but not a substitute for stainless steel in harsh marine conditions.

Specifications

Total pieces	919 pcs
Included sets	225 sets (bolts, nuts, washers)
Sizes	M4, M5, M6, M8
Length range	12-30mm
Material and grade	Alloy steel, Grade 8.8
Finish	Yellow zinc plated
Packing	Double-sided storage box with dividers and latch

Our Verdict

The 919 Pcs Grade 8.8 Metric Bolt Assortment is a strong value for home mechanics and DIY enthusiasts who need a broad range of durable metric fasteners in one organized kit. It covers the most common metric sizes with Grade 8.8 alloy steel and a protective zinc finish, making it a practical, cost-effective choice for general repair and maintenance tasks.

Frequently Asked Questions

Are these bolts stainless steel?
They are alloy steel with yellow zinc plating for corrosion resistance, not stainless steel.

What lengths are included?
The assortment includes bolt lengths ranging from 12mm to 30mm.

Is the storage case durable?
The kit ships in a double-sided box with dividers and a thickened latch designed to keep parts organized and secure.