This metric hex bolt, nut and washer kit is manufactured from alloy steel rated at class 8.8 and finished with a gold zinc (galvanized) coating to improve corrosion resistance and surface wear life. The set is suited for demanding tasks where stronger fasteners are required.

The assortment covers 19 length variations across four thread sizes: M4 x 12mm, 16mm, 20mm, 25mm, 30mm; M5 x 12mm, 16mm, 20mm, 25mm, 30mm; M6 x 12mm, 16mm, 20mm, 25mm, 30mm; and M8 x 16mm, 20mm, 25mm, 30mm. Alongside the hex head bolts and corresponding hex nuts, the kit contains both flat washers and spring lock washers to help secure joints.

The golden zinc plating provides an extra barrier against rust and environmental damage, helping maintain the fasteners’ appearance and mechanical reliability over time. The 8.8 grade alloy substrate delivers substantially higher tensile strength than common low-grade alternatives.

All components come organized in a durable, transparent case with individual compartments so sizes stay separated and visible. The compact, hand-carry box is designed for portability and makes the assortment convenient to bring to jobs or to keep with a home toolbox.

This 966-piece classification is suitable for a broad range of uses: mechanical and electronic equipment, furniture assembly, construction tasks, general machinery repairs, motorcycle and automotive maintenance, and many DIY projects where metric hardware is required.

VerdictSolid, heavy-duty hardware selection for general repairs and projects. The high-strength 8.8 alloy construction and golden zinc finish give corrosion resistance and durability, while the wide range of metric sizes and included washers make this a useful kit for home, workshop, and hobby use. The clear compartment case keeps parts visible and portable, though serious shops may still need a few spec

jlm 5/5

Top metric kit

Superior metric bolt set.

Thom McDermott 3/5

Lengths limited

Needed longer ones.

Davis 5/5

Well stocked

Nice variety and handy case.

Paolo Costa 5/5

Extremely complete set

This kit is very thorough and handy for home use. The two cases are organized and labeled with counts and sizes. Worth the buy and will last a long time.

Dennis Beskorovayny 4/5

Fast delivery

Arrived quickly and well packaged.

Thomas J. 5/5

Quick thanks

Good screws

Jeffrey Steencken 5/5

Good but not exhaustive

Useful for the workshop but it won't cover every length. Good for common repairs, though you'll still need to buy some odd sizes.

shopaholic 5/5

Handy sizes

Nice mix of screws — useful for my 3D prints.

bobwhitebarry 5/5

Great value and functionality

Convenient case and far cheaper than purchasing bolts individually. Quality appears solid.

Indiana Joe 4/5

Good kit but case limits use

Great selection for the money, but the case compartments are tight. Nuts and washers arrive in tiny bags so when emptied together they can be hard to separate.

966-Piece Metric Bolt & Nut Kit — Grade 8.8 Hex Bolts & Nuts

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