Attributes

Brand	-
Category	Standard Parts, Components & Industrial Consumables / Screws
Origin	-
Material	Alloy Steel
Strength Grade	12.9
Head Style	Socket Cap (Cylinder Cup)
Drive Type	Hex Socket (Allen)
Thread Coverage	Fully Threaded
Surface Finish	Black Oxide
Available Sizes	M5, M6, M8, M12, M30
Standard Compliance	DIN 912 / ISO 4762
Tensile Strength	1200 MPa (Minimum)
Application	Heavy Machinery, Automotive, Structural Assembly

6 reviews

Anonymous

Mar 22, 2026

Rating: 5/5

Reliable for automotive suspension

Used these M12 studs for a custom suspension setup. They handled the stress testing without any deformation. The full thread design made installation much easier than partial thread options.

Anonymous

Mar 19, 2026

Rating: 5/5

Perfect fit for M8 applications

Ordered a bulk pack of M8 screws. Every single one fit perfectly into our pre-tapped holes. The hex socket depth is adequate for standard Allen keys. Highly recommended for industrial projects.

Anonymous

Mar 14, 2026

Rating: 4/5

Strong but packaging could be better

The bolts themselves are top-notch, very strong and well-machined. I took off one star because some of the smaller M5 screws were loose in the box upon arrival, though none were lost.

Anonymous

Mar 09, 2026

Rating: 4/5

Good product, fast shipping

Solid construction and consistent sizing across the batch. The black coating seems durable. Only minor issue was that the included size chart was slightly faded, but the product labels were clear.

Anonymous

Mar 05, 2026

Rating: 5/5

Excellent quality for heavy-duty use

These Grade 12.9 bolts are exactly what I needed for my CNC machine assembly. The threading is precise, and the black oxide finish looks professional. No stripping issues even under high torque.

Anonymous

Mar 03, 2026

Rating: 5/5

Great value for Grade 12.9

Compared to local hardware store prices, these are a steal. The quality matches expensive brands I've used before. Will definitely order the M30 size for my next large frame project.

5 FAQ

Q: Can I mix these with Grade 8.8 nuts?

A: Yes, you can use Grade 8.8 nuts, but for optimal performance and to match the tensile strength of these Grade 12.9 bolts, we strongly recommend using Grade 12 or higher nuts.

Q: Do you offer a certificate of conformity with bulk orders?

A: Yes, for bulk orders over 500 units, we can provide a Mill Test Certificate (MTC) or Certificate of Conformity upon request at the time of checkout.

Q: Are these screws suitable for outdoor use without additional coating?

A: While the black oxide finish offers some corrosion resistance, for prolonged outdoor exposure or harsh environments, we recommend applying an additional sealant or using stainless steel variants if available.

Q: Is the thread pitch standard coarse for all listed sizes?

A: Yes, all listed sizes (M5 through M30) come with standard coarse thread pitch unless specifically noted as 'fine pitch' in the product variation selector.

Q: What size Allen key is required for the M12 socket head?

A: For the M12 Socket Cap Screws, you will need a 10mm Allen key (hex wrench) to properly tighten them according to standard DIN 912 specifications.

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