Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Screws
Origin	-
Material	304 Stainless Steel
Head Style	External Hex with Serrated Flange
Drive Type	Cross (Phillips)
Available Sizes	M4, M5, M6, M8
Surface Finish	Polished Silver
Corrosion Resistance	High (Suitable for Outdoor Use)
Feature	Anti-Slip Serrated Washer Integrated
Thread Type	Coarse Thread
Application	Automotive, Machinery, Construction
Package Content	Assorted Kit with Storage Box

6 reviews

Anonymous

Mar 16, 2026

Rating: 5/5

Best screws for outdoor projects

Finally found screws that don't rust after one season. The integrated washer saves time during installation. Will definitely buy again.

Anonymous

Mar 14, 2026

Rating: 5/5

Sturdy and reliable

The hex head provides great torque leverage, and the serrations really do prevent loosening due to vibration. Highly recommend for machinery assembly.

Anonymous

Mar 13, 2026

Rating: 4/5

Solid hardware

Very strong bolts. The finish is smooth and professional. I wish the kit came with a few more M5 options, but overall a great purchase for the price.

Anonymous

Mar 12, 2026

Rating: 5/5

Perfect for automotive repairs

These bolts are exactly what I needed for my car's undercarriage. The serrated flange holds tight without needing a separate washer, and the stainless steel quality is top-notch.

Anonymous

Mar 11, 2026

Rating: 5/5

Excellent corrosion resistance

I used these on a garden trellis exposed to rain and sun. After six months, there is zero rust. The cross drive makes installation easy with a standard drill bit.

Anonymous

Mar 04, 2026

Rating: 4/5

Good value assortment

Great variety of sizes in one box. The M6 and M8 sizes were perfect for my deck project. Only giving 4 stars because the M4 screws were a bit short for my specific need, but that's on me for not checking lengths.

5 FAQ

Q: Does the package include nuts?

A: No, these are self-tapping or designed to be used in pre-threaded holes. The set includes the bolts with integrated serrated flanges but does not include separate nuts.

Q: What is the tensile strength of the M8 bolts?

A: Our 304 stainless steel M8 bolts typically have a tensile strength of approximately 700 MPa, suitable for most general structural and mechanical applications.

Q: What tool is required to install these?

A: You can use a standard Phillips head screwdriver or a power drill with a Phillips bit. The external hex head also allows for use with a socket wrench for higher torque.

Q: Are these screws suitable for marine environments?

A: Yes, made from 304 stainless steel, they offer excellent corrosion resistance for marine and outdoor applications, though 316 grade is recommended for direct saltwater submersion.

Q: Can I use these on aluminum frames without galvanic corrosion?

A: While 304 stainless steel is generally safe, we recommend using an anti-seize compound or a barrier when connecting dissimilar metals like aluminum to prevent potential galvanic corrosion over long periods.

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