Heavy-Duty External Thread Bolts for Reliable Construction Industry Use

• 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

The external thread anchor bolt is an indispensable fastening connector, engineered to deliver top-notch mechanical fastening and anchoring by ingeniously using the nut, the connected part, or the substrate. Its exceptional efficiency is achieved through meticulously processed threads on its outer surface. Below is a comprehensive exploration into its multifaceted attributes:

• Structural Design

Screw Body: This crucial component boasts a thread-coated outer surface and typically features a circular cross-section, available in two main types—coarse and fine threads. Coarse threads, with their robust profile and wide pitch, facilitate rapid installation and offer superior strength. In contrast, fine threads, characterized by their delicate profile and narrow pitch, provide excellent self-locking capabilities and potent anti-loosening properties, ideal for environments subject to impact, vibration, or requiring meticulous adjustments.

Head Type: The head design varies to accommodate different usage scenarios and installation prerequisites. A hexagonal head simplifies tightening with a wrench, ensuring even force distribution. A countersunk head allows for a sleek, aesthetic finish post-installation. The diminutive hexagonal head is perfect for constrained spaces.

Length Specifications: With a spectrum ranging from mere millimeters to several meters, shorter lengths are perfect for thin plate connections, while longer variants excel in deep hole anchoring, adeptly addressing the connection needs of materials or structures of varying thicknesses.

• Materials and Properties

Material Selection: Choose from carbon steel, stainless steel, to alloy steel. Carbon steel offers a budget-friendly yet robust choice for general conditions. Stainless steel stands out with remarkable corrosion resistance, ideal for challenging environments like humidity, acidity, and alkalinity. Alloy steel, enhanced with specific alloying elements, significantly boosts strength, toughness, and high-temperature resistance, making it suitable for demanding scenarios.

Mechanical Properties: These bolts are engineered with high tensile and shear strength, adept at withstanding substantial axial tensile and transverse shear forces, thereby ensuring the robust stability of connections or anchoring parts. Some external thread anchor bolts also feature impressive toughness and ductility, capable of absorbing external impacts, thus preventing brittle failure.

• Working Principle

Conventional Connection: Paired with a nut, the nut rotates, advancing axially along the bolt's external thread, generating a powerful tightening force that fervently clamps and secures multiple components. The inherent friction and self-locking characteristics of the threads assure the reliability of the connection.

Anchor Connection: In substrates like concrete, the process begins with drilling a hole, inserting the anchor bolt, and applying torque to expand and firmly hold the substrate or employing chemical agents for a robust bond. This method leverages mechanical bite or chemical bonding to deliver steadfast anchoring force, securing the connected part to the substrate.

• Application Areas

Construction: These bolts are pivotal in the assembly of concrete structures, steel installations, and curtain wall fixations in construction projects. From securing steel beams to concrete columns to affixing decorative panels on exteriors, they ensure the structural integrity and safety of buildings.

Mechanical Manufacturing: Integral to the assembly of mechanical equipment components, such as machine tools and automotive engines. They guarantee precise positioning and unwavering connection, vital for the seamless operation of machinery.

Bridge Engineering: In bridge construction, these bolts are essential for securing connections between piers and bridge bodies, anchoring deck expansion joints, and more. They are designed to withstand vehicular loads and environmental impacts, thereby ensuring enduring stability of the entire bridge structure.