DIN931 DIN933 M16x100 M16x80 Hot Dip Galvanized Carbon Steel Hex Bolts Grade 8.8

These carbon steel hex bolts are designed for buyers who need standard hex head fasteners with reliable strength, practical corrosion protection, and flexible purchasing options. DIN931 and DIN933 standards support different thread structures, making the product suitable for both partial-thread and full-thread fastening applications.

The material is carbon steel. Carbon steel is widely selected for industrial bolts because it offers stable mechanical performance, good processing efficiency, and cost-effective supply for large-volume orders. For grade selection, 4.8 and 6.8 are suitable for general or medium-duty fastening, while grade 8.8 provides higher strength for stronger clamping performance in machinery, structural, and engineering applications.

The surface treatment is hot dip galvanized, also called HDG. This finish creates a zinc coating on the bolt surface to help protect the carbon steel body from rust and corrosion. It is especially useful for outdoor structures, steel construction, humid storage conditions, exposed brackets, infrastructure hardware, agricultural equipment, and other installation environments where untreated carbon steel may corrode more easily.

Specification Table

Key Features

• DIN931 and DIN933 options for different thread coverage requirements.
• M16x100mm and M16x80mm main sizes for construction, machinery, and steel structure fastening.
• Carbon steel material for stable strength and cost-effective bulk purchasing.
• Grade 8.8 main option for higher-strength fastening needs.
• Grade 4.8 and grade 6.8 options available for general and medium-duty applications.
• Hot dip galvanized finish helps improve corrosion resistance in outdoor and humid environments.
• M8-M72 model range supports broader industrial and distributor purchasing.
• Hex head design allows installation with standard wrenches, sockets, and torque tools.
• Matching nuts can be supplied, with 2 nuts per bolt available.
• Plastic bag, carton, and pallet packaging options support wholesale and export shipment.

DIN931 and DIN933 Bolt Options

DIN931 and DIN933 are both common hex bolt standards, but they are used for different fastening needs. DIN931 is generally selected when a partial-thread bolt is required, leaving an unthreaded shank section for certain grip length and structural connection designs. DIN933 is generally selected when full thread coverage is needed along the bolt length.

For purchasing, buyers can specify the required standard together with diameter, length, grade, surface treatment, thread type, nut requirement, and quantity. This helps match the bolt to the drawing, assembly position, project requirement, or stock list more accurately.

Material and Grade Explanation

The bolt material is carbon steel. Carbon steel is a practical choice for hex bolts used in construction, steel fabrication, mechanical assembly, equipment repair, pipe support, and general industrial fastening because it provides a useful balance of strength, manufacturability, and purchasing value.

Grade 4.8 is suitable for many general-purpose fastening positions. Grade 6.8 can be selected for medium-duty applications where stronger performance than ordinary fastening is required. Grade 8.8 is the key grade for this product and is commonly used for steel structures, machinery, equipment installation, and engineering connections that require stronger clamping performance.

Final grade selection should match the working load, joint design, mating nut grade, installation method, torque requirement, and operating environment.

Hot Dip Galvanized Surface Treatment

Hot dip galvanizing provides a zinc coating on the carbon steel surface. This coating helps reduce corrosion and improves the bolt's suitability for outdoor or moisture-exposed applications compared with plain carbon steel.

HDG hex bolts are commonly used in steel structures, construction hardware, guardrails, brackets, pipe supports, agricultural equipment, power facilities, warehouse racks, and infrastructure-related fastening. The surface appearance is typically silver-gray galvanized, making it suitable for industrial and construction supply.

Recommended Application Areas

Steel Structure and Construction: M16x80mm and M16x100mm hex bolts can be used for steel members, brackets, plates, beams, frames, supports, and construction connection points when the bolt grade and thread structure match the project design.

Machinery and Equipment Assembly: The hex head design makes the bolts suitable for machine frames, equipment bases, covers, repair parts, support components, and maintenance fastening where wrench or socket access is available.

Outdoor Hardware: The HDG finish helps the bolts perform better in outdoor structures, guardrails, storage racks, agricultural installations, pipe supports, and general exposed metal connections.

Wholesale and Distributor Supply: The M8-M72 range, common M16 sizes, grade options, and export packaging choices make the product suitable for fastener distributors, hardware wholesalers, contractors, project buyers, and maintenance stock.

Packaging and Supply

Packaging can be arranged with plastic bags, cartons, and pallets to support storage, transport, warehouse handling, and export shipment. The packaging method can be matched according to bolt size, order quantity, customer market, and loading requirements.

Samples are available for checking size, thread, finish, grade marking, and overall product suitability before bulk purchasing. Bulk supply is available from Handan, Hebei, China, with delivery generally arranged within 3-10 days depending on specification, quantity, and production schedule.

Buyer Specification Checklist

For faster quotation and order matching, buyers can prepare the following information:

• Required standard: DIN931, DIN933, or another listed standard.
• Required size: for example M16x80mm or M16x100mm.
• Required grade: 4.8, 6.8, or 8.8.
• Required surface treatment: hot dip galvanized / HDG.
• Thread requirement: UNC or project-specified thread.
• Nut requirement: bolts only or bolts with 2 nuts per bolt.
• Packaging requirement: plastic bag, carton, pallet, or customized packaging.
• Order quantity, destination market, and preferred delivery schedule.

FAQ

Q1: What material are these DIN931 DIN933 hex bolts made from?

A1: They are made from carbon steel.

Q2: What are the main sizes for this product?

A2: The main sizes are M16x100mm and M16x80mm.

Q3: What grades are available?

A3: Available grades include 4.8, 6.8, and 8.8. Grade 8.8 is the main higher-strength option.

Q4: What is the surface treatment?

A4: The surface treatment is hot dip galvanized, also known as HDG.

Q5: What is the difference between DIN931 and DIN933?

A5: DIN931 is generally used for partial-thread hex bolts, while DIN933 is generally used for full-thread hex bolts.

Q6: What size range can be supplied?

A6: The model range can cover M8-M72, with common sizes including M8, M12, M14, M16, M18, and M20.

Q7: Can matching nuts be supplied?

A7: Yes. Matching nuts are available, and 2 nuts per bolt can be supplied according to the order requirement.

Q8: What packaging options are available?

A8: Packaging options include plastic bags, cartons, and pallets for wholesale and export orders.

Q9: Is a sample available?

A9: Yes. Samples are available for checking size, thread, surface finish, and suitability before bulk order confirmation.

---

Contact Hotop Fasteners for DIN931 DIN933 M16x100mm and M16x80mm hot dip galvanized carbon steel hex bolts.

Send your required standard, diameter, length, grade, surface treatment, thread type, nut requirement, packaging method, and order quantity to receive a fast quotation and suitable bulk supply solution.