The Foundational Workhorse of High-Strength Assemblies
As the foundational fastener for industrial, machinery, and automotive assemblies, our high-strength hex bolt delivers unmatched clamping force and long-term structural reliability. We manufacture this hex bolt to meet globally recognized standards (including ISO, DIN, ANSI, and GB) or specialized custom blueprints, utilizing multi-station cold heading and high-speed thread rolling. Our advanced heat-treatment processes guarantee that each hex bolt achieves its specified mechanical properties (such as Grade 8.8, 10.9, or 12.9) with excellent tensile strength and elongation performance.
Certified Quality for High-Volume B2B Supply
From steering knuckles to frame structures, we supply this hex bolt to major automotive assembly plants and global aftermarket distributors who demand consistent quality. Our factory features a dedicated testing lab where each hex bolt lot undergoes rigorous tensile testing, hardness checks, and 100% dimensional and thread gauging. We offer highly competitive, tiered volume pricing on our standard hex bolt range, and we can quickly process custom thread lengths, flange designs, or surface treatments with a typical lead time of 20 to 30 days.
Product Parameters
Mechanical Standards
DIN 931, DIN 933, ISO 4014, ISO 4017, ANSI B18.2.1, and custom blueprints
Grade Designations
Grade 8.8, 10.9, 12.9, Grade 5, Grade 8, Stainless Steel (A2-70, A4-80)
Thread Range
M5 to M36 (Custom diameters and pitches available)
Surface Plating
Yellow Zinc, Clear Zinc, Hot-Dip Galvanized, Black Oxide, Dacromet, Geomet
Applications
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Automobile chassis frames, engine mounting blocks, and wheel suspension towers
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Heavy machinery, construction equipment, and agricultural tractor assemblies
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Industrial structural steel frameworks and high-pressure piping flanges
Customization Capability
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We support full custom bolt engineering, including specialized thread lengths, custom shank dimensions, and specific head markings.
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Development Lead Time: 20 days for standard configurations; 30–45 days for custom alloy steel hex bolts.
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Flexible MOQ: Extremely flexible order parameters to support small-batch stocking and high-volume industrial contracts.
Packaging & Shipping
Internal Protection
Lined in heavy-duty moisture-proof plastic bags to prevent oxidation.
External Packaging
Packed in reinforced 25kg cartons, securely palletized, and wrapped in multi-layer stretch film.
Supported Terms
EXW, FOB, and DDP with streamlined shipping to any global destination.
FAQ
Q: How do you verify the mechanical grade of each hex bolt?
A: We conduct proof-load testing, wedge tensile testing, and Rockwell hardness testing on every production lot, and we issue full test reports.
Q: Can we customize the head marking with our own brand logo?
A: Yes, we can manufacture custom heading dies to stamp your brand logo and grade marking directly onto the bolt head.
Q: Do you have a stock of standard hex bolt items for immediate shipment?
A: Yes, we maintain stock on a wide range of standard DIN/ISO specifications, allowing us to ship in-stock orders within 3 to 5 days.
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