HDG Carbon Steel Hex Head Bolts Grade 4.8 8.8 ASTM A193 B7

These hex head bolts are made from carbon steel and finished with HDG surface treatment for better corrosion resistance in construction, outdoor installation, steel assembly, machinery, and general industrial environments. The hex head shape allows easy tightening with standard wrench and socket tools, making installation efficient for both workshop assembly and on-site fastening.

The available grade range includes 4.8, 6.8, 8.8, 10.9, and 12.9. Grade 4.8 and 6.8 are suitable for general fastening, while grade 8.8, 10.9, and 12.9 can be selected for higher-strength applications. The product title also includes ASTM A193 B7 as an important searchable specification for buyers sourcing heavy-duty bolt solutions.

The size range covers M8-M36, with length options from 20mm to 200mm. The UNC thread type, hex head design, and available nut sets make these bolts suitable for metal structures, brackets, equipment installation, maintenance projects, and fastener distribution.

Specification Table

Key Features

• Carbon steel bolt body for practical strength and cost-effective bulk purchasing.
• HDG hot dip galvanized surface treatment for improved corrosion resistance.
• Grade options include 4.8, 6.8, 8.8, 10.9, and 12.9 for different load needs.
• M8-M36 size range covers common industrial and construction fastening sizes.
• 20-200mm length range supports multiple installation depths and connection types.
• UNC thread type for buyers requiring unified thread fastener specifications.
• Nuts can be supplied with the bolts, with 2 nuts per bolt available.
• ISO9001 certificate supports quality-focused procurement requirements.

Applications

These HDG carbon steel hex head bolts can be used in construction projects, steel structure assembly, machinery installation, equipment maintenance, pipe supports, metal brackets, agricultural machinery, warehouse racks, vehicle repair, guardrail systems, and general industrial fastening.

Packaging and Supply

Standard packaging can include plastic bags and cartons for practical handling, storage, and shipping. Packaging can be arranged according to bolt size, order quantity, export requirements, and customer purchasing plan.

Samples can be freely supplied for specification checking and purchase evaluation. Bulk orders can be supported from Handan, Hebei, China, with delivery time generally arranged within 3-15 days depending on size, quantity, finish, and stock status.

FAQ

Q1: What material are these hex head bolts made from?

A1: They are made from carbon steel.

Q2: What grades are available?

A2: Available grades include 4.8, 6.8, 8.8, 10.9, and 12.9.

Q3: What sizes can be supplied?

A3: The available size range is M8-M36, with length options from 20mm to 200mm.

Q4: What surface treatment is used?

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

Q5: Are nuts included with the bolts?

A5: Yes, nuts can be supplied with the bolts, with 2 nuts per bolt available.

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Contact Hotop Fasteners for HDG carbon steel hex head bolts in M8-M36 sizes.

Send your required diameter, length, grade, thread type, nut requirement, packaging method, and order quantity to receive a suitable quotation and supply plan.