Attributes

Brand	-
Category	Industrial Small Parts / Connectors and Fasteners
Origin	-
Material	Carbon Steel
Strength Grade	8.8 Class
Head Style	Socket Cap Head
Drive Type	Internal Hexagon
Thread Standard	Metric Coarse
Surface Finish	Black Oxide
Thread Direction	Right Hand
Point Type	Flat Point
Compliance Standard	GB70 / DIN912
Package Type	Bulk Box

5 reviews

Anonymous

Apr 22, 2026

Rating: 4/5

Fast Shipping

Product arrived quickly and matches the description. Good selection of sizes available.

Anonymous

Apr 12, 2026

Rating: 4/5

Good Value

Works well for my project. Threads are clean and consistent. Packaging was secure.

Anonymous

Mar 14, 2026

Rating: 5/5

Excellent Quality

These screws are very strong and fit perfectly into my machinery assembly. The black oxide finish looks professional.

Anonymous

Feb 14, 2026

Rating: 5/5

Sturdy Fasteners

Happy with the 8.8 grade strength. Used them for automotive repairs and they hold torque well.

Anonymous

Feb 07, 2026

Rating: 5/5

Precise Threads

Threads fit perfectly without cross-threading. High strength grade gives me confidence in the build.

5 FAQ

Q: Do you offer M8 size in this listing?

A: Yes, please select the M8 option from the size variation menu before adding to cart.

Q: What is the hardness rating?

A: The 8.8 grade typically corresponds to a hardness range of 22 to 32 HRC.

Q: What Allen key size is needed for M5?

A: For an M5 socket cap screw, you will typically need a 4mm Allen key.

Q: Are these suitable for outdoor use?

A: Black oxide offers limited corrosion resistance. For outdoor use, we recommend applying additional oil or coating.

Q: Is this material stainless steel?

A: No, this product is made of carbon steel with a black oxide finish for general industrial use.

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