705-Pc M3 M4 M5 Stainless Steel Hex Bolt Nut Washer Kit + Box

$139.61 $172.05

705-Piece Stainless Steel Fastener Assortment Kit — M3, M4 & M5

Keep every DIY project, home repair, or workshop job on track with this comprehensive 705-piece stainless steel fastener kit. Packed with M3, M4, and M5 hex bolts, matching hex nuts, flat washers, and lock washers — all in one neatly organized storage box — this is the all-in-one hardware solution for hobbyists, makers, and professionals alike.

Made in Mainland China.

304 Stainless Steel — Built to Last

Every piece in this kit is crafted from 304 stainless steel, offering a clean silver finish, smooth precision threads, and excellent resistance to rust and corrosion. Reliable for indoor and outdoor applications including furniture assembly, electronics, machinery maintenance, and metal bracketing work.

Multiple Sizes for Every Project

With M3, M4, and M5 bolts available in 8 mm, 12 mm, 16 mm, and 20 mm lengths (approx. 0.31 in, 0.47 in, 0.63 in, 0.79 in), you'll always have the right fastener on hand — whether you're securing thin panels, brackets, or thicker equipment components.

Complete Fastening Combination

Each setup pairs a hex bolt with a flat washer, lock washer, and hex nut. The flat washer distributes load and protects contact surfaces; the lock washer adds stability and reduces the risk of loosening under vibration or regular use.

Organized, Portable Storage Box

All 705 pieces are sorted into a clear plastic storage case with individual compartments for each size — no more searching through tangled hardware bags. The compact case is easy to carry to any worksite or tuck away in a drawer until needed.

Wide Range of Applications

Home maintenance & furniture assembly
Electronics & PCB assembly
Machinery repair & maintenance
Metal brackets & panel installations
General workshop & DIY projects
Small equipment component fastening

What's in the Box

705 × 304 Stainless Steel Fasteners (hex bolts, hex nuts, flat washers, lock washers)
Sizes: M3, M4, M5 — lengths 8 mm, 12 mm, 16 mm, 20 mm
1 × Clear plastic compartment storage box

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Frequently Asked Questions

Q: What sizes and lengths are included in the 705-piece stainless steel fastener kit?

A: The kit includes M3, M4, and M5 hex bolts in four lengths — 8 mm, 12 mm, 16 mm, and 20 mm (approximately 0.31 in, 0.47 in, 0.63 in, and 0.79 in). Each bolt size is paired with matching hex nuts, flat washers, and lock washers for complete fastening setups.

Q: Are these fasteners suitable for outdoor or moisture-prone environments?

A: Yes. All fasteners are made from 304 stainless steel, which offers good corrosion and rust resistance, making them suitable for use in humid environments, outdoor fixtures, and applications where moisture exposure is a concern.

Q: How are the 705 pieces stored and organized?

A: The entire set comes in a clear plastic compartment storage box with separate sections for each size and type. This keeps bolts, nuts, flat washers, and lock washers neatly sorted so you can quickly find the right piece for any task without rummaging through loose hardware.

Q: What tools are needed to install these hex bolts and nuts?

A: A standard hex wrench (Allen key) or a socket wrench of the appropriate M3, M4, or M5 metric size is all you need to tighten the bolts and nuts securely. No specialized tools are required for most DIY and workshop applications.