ANSI B18.2.1 Hex Cap Screws (SAE Grade 2/5/8)

We are proud to officially launch our brand-new ANSI B18.2.1 Hex Cap Screws (SAE Grade 2/5/8), a dedicated American standard product line that fills our gap in US standard fasteners and has no overlap with all previously released DIN standard products.

ANSI B18.2.1 is the core American standard for hex cap screws, featuring a full thread or half thread design, hex head for easy wrench operation, and wide applicability in North American machinery, construction, automotive and industrial assembly. All products strictly comply with ANSI B18.2.1, SAE J429 standards, with precise thread pitch, uniform head size and stable mechanical performance, specially tailored for North American market procurement and export projects.

 Core Product 

Features Standard ANSI hex head design, perfect fit for American standard wrenches, no slipping during installation Full thread (UNC/UNF) and half thread options, meeting different assembly depth and load requirements

Strictly follow SAE grade standards, clear strength classification, matching different load scenarios

Smooth thread surface, no burrs, easy to screw in and disassemble, reusable

Complete specifications: #4–1/2 inch, regular sizes in stock, support custom lengths

Multiple materials and surface treatments, adapting to indoor, outdoor and anti-corrosion environments

Grade, Material & Specification 

ANSI Standard SAE Grade Material Surface Treatment Thread Type Main Application ANSI B18.2.1Grade 2Low Carbon Steel Zinc Plated (Clear/Blue) UNC/UNF Light-duty machinery, furniture, general assembly, low-load occasions

ANSI B18.2.1Grade 5Medium Carbon Steel (Heat Treated) Zinc Plated / Black Oxide UNC/UNF 

General machinery, automotive parts, construction brackets, medium-load applications

ANSI B18.2.1Grade 8Alloy Steel (Heat Treated) Black Oxide / Zinc Plated (Yellow)UNC/UNF

Heavy-duty machinery, high-strength structures, automotive suspension, high-load occasions

ANSI B18.2.1A2-70304 Stainless Steel

Natural Polished UNC/UNF Outdoor, coastal, humid environments, anti-rust anti-corrosion applications

Matching & Typical Application Scenarios

This ANSI hex cap screw series is specially designed for North American market and global projects requiring American standard fasteners, mainly used in: North American machinery manufacturing, automotive assembly, heavy equipment maintenance

Construction engineering, steel structure brackets, pipeline supports in North America and South America

Industrial MRO (Maintenance, Repair and Operations) for American standard equipment

Export projects matching ANSI standard, OEM/ODM supporting for North American customers

Hardware distributors focusing on American standard fasteners, retail and bulk procurement

Why Choose GTZL ANSI B18.2.1 Hex Cap Screws

We focus on American standard fastener production and export, with rich experience in matching North American market needs, solving the pain points of inconsistent standards and unstable quality for overseas buyers.

Strictly follow ANSI B18.2.1 and SAE J429 standards, thread pitch and size 100% compliant with American standard requirements

Heat treatment process strictly controlled, each grade meets the specified tensile strength and hardness requirements

Regular sizes in stock, fast delivery for small trial orders and bulk container orders

Complete export documents, including material certificate, grade test report, customs declaration documents

Support custom lengths, surface treatments and OEM packaging, meeting the personalized needs of North American customers

Long-term stable supply to North America, South America and other markets, familiar with local procurement standards

Conclusion

The launch of ANSI B18.2.1 Hex Cap Screws (SAE Grade 2/5/8) enriches our American standard fastener product line, enabling us to provide more comprehensive one-stop procurement solutions for global buyers, especially those focusing on the North American market.

With standard compliance, stable quality, complete specifications and professional export service, this series will become the preferred choice for American standard fastener procurement. We will continue to expand our standard product portfolio, covering DIN, ANSI, ISO and other mainstream standards, to meet the diversified procurement needs of global customers.