Reliable External Thread Fasteners for Quality Building Curtain Wall Systems

• Customization: Available
• Application: Concrete Anchoring
• Finish: Zinc Plated
• Grade: 4.8
• Head Style: Flat Head
• Material: Steel
• Standard: ANSI
• Type: Bonded Anchor Bolt
• Applicable Industries: Construction Industry
• Strength Level: 4.8
• Use: Standard
• Whether to Support Customization: Support
• Transport Package: Container
• Specification: 1-100
• Trademark: Huilin
• Origin: Handan, Hebei
• HS Code: 0101101010
• Production Capacity: 50000

Product Description

External thread anchor bolts are indispensable fastening connectors in the construction industry. They achieve superior mechanical fastening and anchoring by working harmoniously with nuts, connected parts, or substrates, utilizing meticulously processed threads on their outer surfaces. Here, we present a comprehensive introduction from various perspectives:

• Structural Design

Screw Body: Adorned with prominent threads, the screw body usually features a circular cross-section, divided into coarse and fine threads. Coarse threads boast a larger profile with wider pitch, facilitating speedy installation with exceptional strength. Fine threads, with their refined profile and narrow pitch, excel in self-locking performance and robust anti-loosening capability, ideal for high-impact, vibrating, or finely-adjusted scenarios.

Head Type: The head design varies according to usage and installation needs. The hexagonal head ensures easy tightening with a wrench, delivering uniform force distribution. A sinking head offers a smooth and aesthetically pleasing surface post-installation, while the hexagonal head suits confined spaces with minimal operating room required.

Length Specifications: Spanning a range from mere millimeters to several meters, shorter variants serve thin plate connections, whereas longer ones are apt for deep-hole anchoring. This versatility caters to diverse connection demands across different material or structural thicknesses.

• Materials and Properties

Material Selection: Predominantly crafted from carbon steel, stainless steel, and alloy steel. Carbon steel is cost-effective and strong, suited for general conditions. Stainless steel resists corrosion admirably, perfect for humid, acidic, or alkaline settings. Alloy steel, augmented with specific elements, attains superior strength, toughness, and heat resistance for challenging environments.

Mechanical Properties: These bolts exhibit high tensile and shear strength, adeptly handling significant axial and transverse forces, ensuring steadfast stability in connections or anchoring. Some external thread anchor bolts also feature commendable toughness and ductility, absorbing impacts to prevent brittle fractures.

• Working Principle

Conventional Connection: In tandem with a nut, the nut's rotation along the external thread of the bolt generates a tightening force that securely clamps multiple components. The thread's friction and self-locking traits uphold the connection's reliability.

Anchor Connection: For concrete or similar substrates, a hole is drilled first, the anchor bolt inserted, and torque applied to expand the bolt, compressing the substrate, or using chemicals for a robust bond. This mechanical or chemical bonding ensures firm anchoring of the connected parts to the substrate.

• Application Areas

Construction: Pivotal in concrete structure connections, steel structure installations, and curtain wall fixations in construction projects. Whether connecting steel beams to concrete columns or securing exterior decorative panels, these bolts guarantee the structural integrity and safety of buildings.

Mechanical Manufacturing: Essential for assembling components in mechanical equipment, such as machine tools and automotive engines, enabling precise positioning and dependable component connections for smooth equipment operation.

Bridge Engineering: Integral to bridge construction, facilitating connections between piers and the bridge body, and securing bridge deck expansion joints. These bolts withstand vehicular loads and natural environmental effects, ensuring bridge stability and longevity.