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

Hex socket head cap bolts are widely used in mechanical assembly and equipment fastening where the bolt head needs to fit into a recessed or compact installation space. Compared with external hex bolts, the internal hex socket design allows tightening with an Allen key or hex wrench, making the bolt suitable for equipment, machinery, molds, fixtures, and structural components where neat appearance and strong fastening are both important.

This product is supplied in steel, with material options including carbon steel and stainless steel. Carbon steel is suitable for most machinery, construction hardware, and industrial fastening applications where strength and cost efficiency are important. Stainless steel options can be selected when corrosion resistance or cleaner appearance is required.

The available grades include 4.8, 8.8, 10.9, and 12.9. Grade 4.8 is suitable for general fastening. Grade 8.8 is suitable for stronger mechanical assembly. Grade 10.9 provides higher tensile strength for demanding equipment and industrial use. Grade 12.9 is commonly selected for high-strength socket head bolts used in machinery, molds, automotive repair, and precision assembly.

The product supports DIN and ANSI standards. Visible thread sizes include M4, M5, M6, M7, M8, M10, and M12, while the model information includes M6, M8, M10, M12, and M16. Available bolt length options include 30 mm, 35 mm, 40 mm, 45 mm, 65 mm, and 75 mm. Customization is available for project orders, distributor packing, and customer-specific requirements.

Specification Table

Material and Grade Details

Application

Hotop Fasteners hex socket head cap bolts are suitable for fastening applications where strong tightening force, compact head size, and clean assembly are required. The internal hex socket structure allows the bolt to be installed in narrow or recessed positions, making it practical for industrial equipment and mechanical systems.

Common application areas include:

• Machinery assembly
• Equipment installation
• Mold and die fixing
• Automotive repair and maintenance
• Steel structure connection
• Industrial frame assembly
• Mechanical parts fastening
• Tooling and fixture assembly
• Electrical equipment installation
• Furniture and hardware assembly
• Maintenance and replacement fastener supply
• General industrial and construction fastening

Black socket bolts are often selected for machinery and equipment where a dark appearance is preferred. Zinc and white zinc options are suitable for general corrosion protection and clean surface appearance. Yellow zinc and HDG options can be selected for project-based surface requirements.

Matching Fasteners

These socket head cap bolts can be used with matching nuts, washers, and related fastener components to build a complete fastening system.

Packing & Delivery

The product is supplied as a single item selling unit, with a single package size of 20 x 15 x 10 cm and a single gross weight of 2.0 kg. MOQ is 1 ton.

Available packing support includes:

• Standard carton packing
• Bulk packing for industrial orders
• Custom packaging
• Custom logo packing
• Graphic customization
• Export packing according to order requirements
• Pallet packing for large-volume shipment

Custom logo, custom packaging, and graphic customization are available from 2 tons. Samples are available for customers who need to check size, thread, surface finish, and grade suitability before bulk purchasing.

FAQ

Q1: What product is this?

A1: This product is a hex socket head cap bolt, also called a hex socket bolt or socket head cap screw.

Q2: What material is available?

A2: The product is made from steel, with material options shown as carbon steel / stainless steel.

Q3: What grades are available?

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

Q4: What standards can be supplied?

A4: The product supports DIN and ANSI standards.

Q5: What surface treatments are available?

A5: Available surface treatments include zinc, black, white zinc, yellow zinc, and HDG.

Q6: What thread sizes are available?

A6: Visible thread size options include M4, M5, M6, M7, M8, M10, and M12.

Q7: What model sizes are shown?

A7: The model information includes M6, M8, M10, M12, and M16.

Q8: What bolt lengths are available?

A8: Available length options include 30 mm, 35 mm, 40 mm, 45 mm, 65 mm, and 75 mm.

Q9: What is the MOQ?

A9: The MOQ is 1 ton.

Q10: Can the product be customized?

A10: Yes. Hotop Fasteners supports custom logo, custom packaging, and graphic customization.

Q11: What is the customization MOQ?

A11: The customization MOQ shown is 2 tons.

Q12: Where is Hotop Fasteners located?

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

Q13: What applications are these bolts suitable for?

A13: They are suitable for machinery assembly, equipment installation, mold fixing, automotive repair, steel structure connection, and general industrial fastening.

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Need DIN912 hex socket head cap bolts for machinery, molds, equipment, or industrial assembly?

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

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