Hex bolts and nuts are fundamental fasteners featuring a six-sided head with machine threads and internal threads respectively. The bolt secures through a nut or tapped hole, while the nut threads onto the bolt shank. These components serve structural connections, machinery assemblies, and general hardware applications, conforming to ASTM, DIN, and ISO standards.
Material selection addresses specific environmental demands. Stainless steel grades include 18-8 and 316, with 316 offering superior corrosion resistance for salt water and chlorine environments. Carbon steel variants feature zinc plated finishes for moderate corrosion protection, while tempered medium carbon steel grades 5 and 8 deliver high strength performance. Additional options include aluminum for lightweight requirements, silicon bronze for enhanced corrosion resistance, and nylon for non-metallic applications.
Configuration variants meet diverse mechanical requirements. Standard hex nuts serve general purposes, while heavy hex nuts provide larger, thicker profiles for high strength structural applications. Hex bolts are available fully threaded (DIN 933) or partially threaded (DIN 931). Specialized versions include lock nuts preventing loosening and structural bolts meeting ASTM A325 specifications for heavy-duty construction. Sizing ranges from 1/2 inch to 1 1/4 inch in imperial measurements and M5 to M64 in metric, with lengths from 1 1/2 inches to 8 inches supporting automotive, marine, construction, and industrial equipment installations.
ISO-Certified Hex Bolt and Nut Wholesaler
As a leading hex bolt manufacturer in China, RaxPower has become a trusted fastener supplier for domestic and international customers through 21 years of manufacturing and exporting experience. Located in Hebei Province, we operate with a core philosophy of sincerity, devotion, creativity, and innovation, ensuring customer satisfaction and supreme quality.
- Standards: We adhere to international certifications such as AS9100D and ISO9001:2015, providing high-quality hex bolts and nuts that meet stringent requirements for regulated applications in aerospace, defense, and other high-performance industries.
- Core Advantages: Specializing in custom solutions, our hex bolts and nuts offer lightweight, high strength, and excellent corrosion resistance. Leveraging advanced processes like hot forging and precision hot-dip galvanizing, we achieve superior durability and performance, with galvanized surfaces smooth and bright, adhering to ISO 1461 standards.
- Quality Control: Our comprehensive quality management includes strict raw material selection, multi-stage testing, and reviews before packing. Products undergo Load Tests and Gauges Tests per IEC 120, with verification from SGS and authoritative institutes, ensuring 100% quality.
- Applications: Ideal for power line construction, machinery, automotive, and other sectors requiring reliable fastening.
- Why Choose: With 17,000 sqm production workshops, a team of over 170 employees including 30 technicians and 10 engineers, and a commitment to technological expertise, we deliver cost-effective, high-performance solutions.
Talk with our experts today and let us help you figure out the best solution.
| Type | Material | Grade | Thread Type | Standard | Finish | Diameter Range | Length Range |
|---|---|---|---|---|---|---|---|
| Bolt | Stainless Steel | 18-8 | Full/Partial | ASTM, DIN, ISO | Plain | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | 1 1/2″ – 8″ (imperial) |
| Bolt | Stainless Steel | 316 | Full/Partial | ASTM, DIN, ISO | Plain | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | 1 1/2″ – 8″ (imperial) |
| Bolt | Carbon Steel | 2 | Full/Partial | ASTM A307 | Zinc Plated | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | 1 1/2″ – 8″ (imperial) |
| Bolt | Carbon Steel | 5 | Full/Partial | ASTM A354 | Zinc Plated | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | 1 1/2″ – 8″ (imperial) |
| Bolt | Carbon Steel | 8 | Full/Partial | ASTM A354 | Zinc Plated | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | 1 1/2″ – 8″ (imperial) |
| Bolt | Aluminum | N/A | Full/Partial | ASTM, DIN, ISO | Plain | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | 1 1/2″ – 8″ (imperial) |
| Bolt | Silicon Bronze | N/A | Full/Partial | ASTM, DIN, ISO | Plain | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | 1 1/2″ – 8″ (imperial) |
| Bolt | Nylon | N/A | Full/Partial | ASTM, DIN, ISO | Plain | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | 1 1/2″ – 8″ (imperial) |
| Nut | Carbon Steel | N/A | Internal | ASTM, DIN, ISO | Zinc Plated | 1/2″ – 1 1/4″ (imperial), M5 – M64 (metric) | N/A |
| Nut | Carbon Steel | A563 | Internal | ASTM A563 | Plain, Hot-dip Galvanized | 3/8″ – 2-3/4″ (imperial) | N/A |
Frequently Asked Questions (FAQS)
What are hex bolts and nuts?
Hex bolts are six-sided bolts with machine threads for use with a nut or in a tapped hole, also known as hex cap screws or machine bolts. Hex nuts are six-sided general purpose nuts with internal screw threads that screw onto the shank of a hex head cap screw or other bolts.
What are the common applications for hex bolts and nuts?
Common applications include construction (buildings, bridges, dams), automotive industries, marine and coastal environments, valves, pumps, heat exchangers, process vessels, machinery assembly, power transmission, and various industrial projects where reliable fastening is required.
What materials and surface treatments are available?
Materials include stainless steel (18-8 and 316), zinc plated steel, grade 5 and grade 8 steel, chrome plated steel, hot dipped galvanized steel, aluminum, nylon, silicon bronze, and various alloy steels. Surface treatments include electro-galvanized (white zinc, yellow zinc), hot-dip galvanized, dacromet coating, black oxide, non-electrolytic zinc flake coating, and plain finishes, providing corrosion resistance and strength for different environments.
What standards do your hex bolts and nuts comply with?
They comply with international standards such as DIN 931, DIN 933, ISO 4014, ISO 4017, ASTM A325, A490, A307, GB/T 5782, and EN 15048, ensuring dimensional accuracy, mechanical properties, and performance. We provide documentation including CE certificates and test reports for regulated industries like railway electrification, power transmission, and energy sectors.
What sizes are available for hex bolts and nuts?
Sizes range in diameter from 1/2
How are hex bolts manufactured and tested?
Manufacturing involves cold or hot forging for shaping the bolt head and body, threading to cut machine threads, heat treatment to enhance strength and hardness, and surface treatment for corrosion resistance. We employ strict quality control including raw material selection, multi-stage testing, and automated processes. Each bolt undergoes tensile strength, hardness, and chemical composition testing, with ISO and SGS certifications verifying compliance with international standards for maximum durability and performance in critical infrastructure projects.
Can you handle large-scale bulk orders with on-time delivery?
Yes, with advanced production lines, efficient supply chain management, and substantial inventory capacity, we manage bulk orders efficiently. Our manufacturing processes are optimized for quick production and reliable delivery timelines, ensuring all project components arrive as scheduled without delays.
Are customization and cost-effective pricing available for OEM and distributor partnerships?
We offer extensive customization options in sizes, materials, grades, and surface treatments, tailored to your specifications. Through economies of scale and efficient production, we provide competitive, cost-effective pricing for bulk purchases, supporting your need for consistent quality and profitability in resale or integration.
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