705-Pc M3 M4 M5 Stainless Steel Hex Bolts Nuts Washers Kit

$139.61 $172.05

705-Piece 304 Stainless Steel Fastener Assortment Kit

Keep every DIY and repair project on track with this comprehensive 705-piece fastener kit. Packed with M3, M4, and M5 hex bolts, hex nuts, flat washers, and lock washers — all crafted from durable 304 stainless steel — this set gives you everything you need for home maintenance, workshop repairs, electronics assembly, furniture installation, and more.

304 Stainless Steel — Built to Last

Each piece is made from genuine 304 stainless steel, delivering a clean silver finish, precisely cut threads, and excellent resistance to rust and corrosion. These fasteners stand up to regular workshop use and are equally at home in moisture-prone environments or general hardware applications.

Multiple Sizes for Total Flexibility

The kit covers M3, M4, and M5 thread sizes across four bolt lengths — 8 mm (0.31 in), 12 mm (0.47 in), 16 mm (0.63 in), and 20 mm (0.79 in) — so you'll always have the right fastener on hand regardless of material thickness, bracket size, or panel depth.

Complete Fastening Combination

Every hardware setup includes a matching hex bolt, flat washer, lock washer, and hex nut. The flat washer distributes load and protects contact surfaces, while the lock washer reduces loosening over time, ensuring a secure and stable connection on every job.

Organized Storage Box Included

All 705 pieces are housed in a clear plastic storage box with individual compartments for each size and type. The compact, portable case keeps everything sorted so you can grab exactly what you need without rummaging through loose hardware.

Wide Range of Applications

DIY home repair & renovation
Workshop machinery maintenance
Electronics and PCB assembly
Furniture construction & fixture installation
Metal brackets and small equipment parts
Automotive and bicycle repairs

Package Includes

1 × 705-Piece 304 Stainless Steel Fastener Assortment Kit
Includes: M3/M4/M5 hex bolts (8/12/16/20 mm), hex nuts, flat washers, lock washers
1 × Compartmented clear plastic storage box

Made in Mainland China.

Frequently Asked Questions

Q: What stainless steel grade are these bolts and nuts made from?

A: All fasteners in this 705-piece kit are manufactured from 304 stainless steel, a widely used grade known for its smooth finish, clean threading, and strong resistance to rust and corrosion — making it ideal for both indoor and light outdoor applications.

Q: What sizes and lengths are included in the M3 M4 M5 hex bolt assortment kit?

A: The kit includes M3, M4, and M5 hex bolts in four lengths each: 8 mm, 12 mm, 16 mm, and 20 mm. Each bolt size is paired with matching hex nuts, flat washers, and lock washers for a complete fastening solution across all three thread sizes.

Q: Is the storage box suitable for keeping the fasteners organized in a workshop?

A: Yes. The included clear plastic storage box features separate compartments for each fastener type and size, making it easy to identify and retrieve exactly what you need. Its compact design is ideal for toolboxes, workbenches, and on-the-go repair kits.

Q: Can these stainless steel fasteners be used for electronics assembly?

A: Absolutely. The M3 and M4 sizes are particularly popular for PCB mounting, electronics enclosures, and small equipment assembly. The precise threading and corrosion-resistant 304 stainless steel construction make them a reliable choice for sensitive electronics work.