DIN912 Black Hex Socket Head Cap Bolts Carbon Steel 4.8 8.8 10.9 12.9 Zinc, Plain and Black Fasteners

Hex socket head cap bolts are widely used where reliable fastening, strong tightening torque, and a clean installation profile are required. The internal hex socket drive helps prevent slippage during tightening and is especially useful for machinery, molds, precision equipment, and installation areas where external hex heads may not be ideal.

This product is made from steel / carbon steel, with confirmed grades 4.8, 8.8, 10.9, and 12.9. Grade 4.8 is suitable for general fastening. Grade 8.8 is a common high-strength choice for machinery and equipment. Grade 10.9 is suitable for demanding industrial assemblies requiring greater tensile performance. Grade 12.9 is the strongest visible option on the page and is often selected for high-load mechanical fastening and precision applications.

The product supports DIN and ANSI standards, which makes it suitable for buyers looking for standard-compatible fasteners for export, industrial supply, or project-based procurement. The page shows multiple finish options, including zinc, plain, black, and black oxide, which gives flexibility for different environments and appearance requirements.

Visible thread size options include M6, M8, M10, M12, M16, M20, M22, M24, and M26, while the product page also shows length options such as 16 mm, 20 mm, 25 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, 85 mm, and more. This makes the product suitable for both standard stock use and customized project sourcing.

Specification Table

Material and Grade Details

Application

Hotop Fasteners hex socket head cap bolts are suitable for a wide range of fastening scenarios where a strong, compact, and reliable bolt is needed. The internal hex drive makes them especially useful where installation space is limited or where a cleaner surface finish is preferred.

Common applications include:

• Machinery assembly
• Equipment installation
• Mold and die fixing
• Automotive repair and maintenance
• Industrial frame assembly
• Steel structure connection
• Mechanical parts fastening
• Tooling and fixture installation
• Electrical and equipment housing assembly
• Workshop and maintenance use
• General hardware distribution
• Engineering and industrial procurement

Black oxide and black finish bolts are often chosen for machinery and equipment where appearance and anti-reflective surface treatment are preferred. Zinc finish bolts are suitable for standard protective needs, while plain bolts can be selected for further processing or controlled installation environments.

Matching Fasteners

These socket head cap bolts can be paired with matching fasteners to build a complete installation system. Hotop Fasteners can supply related items for project purchasing and inventory matching.

Packing & Delivery

The product page shows a single item selling unit with a single package size of 5 x 5 x 3 cm and a single gross weight of 2.0 kg. The MOQ is 10,000 pieces. Available packing support includes:

• Standard bag packing
• Carton packing
• Pallet packing
• Bulk packing for industrial orders
• Custom logo packing
• Custom packaging
• Graphic customization
• Export packing according to order requirements

The product supports sample orders, which makes it easier to check fit, finish, and grade before placing a bulk purchase. For large-volume or project-based orders, packaging and marking can be adapted to the buyer’s requirement.

FAQ

Q1: What is this product?

A1: This is a hex socket head cap bolt, also known as a DIN912 socket head cap screw.

Q2: What material is available?

A2: The product is available in steel and carbon steel.

Q3: What grades are available?

A3: The available grades are 4.8, 8.8, 10.9, and 12.9.

Q4: What standards does it support?

A4: It supports DIN and ANSI standards.

Q5: What surface treatments are available?

A5: The available surface treatments are zinc, plain, black, and black oxide.

Q6: What thread sizes are available?

A6: Visible thread sizes include M6, M8, M10, M12, M16, M20, M22, M24, and M26.

Q7: What is the size range shown on the page?

A7: The model range is M6-M36.

Q8: What bolt lengths are available?

A8: The page shows length options including 16 mm, 20 mm, 25 mm, 30 mm, 40 mm, 50 mm, 60 mm, 70 mm, and 85 mm.

Q9: What is the MOQ?

A9: The MOQ is 10,000 pieces.

Q10: Can I request samples?

A10: Yes, samples are available.

Q11: Can the product be customized?

A11: Yes. Custom logo, custom packaging, and graphic customization are available.

Q12: Where is the supplier located?

A12: Hotop Fasteners supplies from Handan, Hebei, China.

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Looking for reliable DIN912 hex socket head cap bolts for machinery, equipment, or industrial assembly?

Contact Hotop Fasteners in Handan, Hebei, China to request a quotation, sample, or customized fastening solution.

Send your required size, grade, surface treatment, quantity, and packing details, and our team will help match the right socket bolt for your project.