Durable Three Combination Bolts with Full Thread and Customization Support

• Customization: Available
• Material: Carbon Steel
• Type: Hexagon Head
• Model NO.: 1-1
• Connection: Common Bolt
• Head Style: Hexagonal
• Standard: DIN
• Grade: 4.8
• Application: Building
• Finish: Color-Zinc Plated
• Thread Type: Full Thread
• Whether to Support Customization: Support
• After-Sales: Three Months
• Use: Standard
• Transport Package: Container
• Specification: 1-30
• Trademark: Huilin
• Origin: Handan, Hebei
• HS Code: 0101101010
• Production Capacity: 50000

Product Description

Introducing the Cross Hexagon Three Combination Bolt, also renowned as the Cross Groove Outer Hexagon Combination Screw or the Cross Groove Concave Hexagon Head Three Combination Screw. Dive into its unique features and benefits below:

Structural Characteristics

• Head Shape: Designed as an outer hexagon, it allows effortless use with tools like wrenches for tightening or loosening operations. Enhanced with a cross groove, it supports a cross screwdriver for increased operational convenience and flexibility.

Combination Form: This versatile bolt comprises an external hexagonal bolt with a convenient cross groove, a durable flat washer, and a reliable spring washer. The flat washer amplifies the contact area and distributes pressure evenly, while the spring washer offers elastic preload force to secure the bolt against loosening.

Specification and Size

Thread Specifications: Popular options include M3, M4, M5, M6, M8, etc., with diameters typically ranging from M3 to M8. While M10 is available, it's less commonly utilized.

• Length Range: The bolt length varies from a compact 5mm to an extensive 90mm, offering versatility for various applications.

Flat Pad Size: The thickness and outer diameter of the flat pad are dependent on thread specifications. For instance, an M3 bolt features a 0.5mm thick pad with a 7mm outer diameter, while an M4 bolt boasts a 0.8mm thick pad and a 9mm outer diameter.

Materials and Properties

Materials: Predominantly crafted from iron, carbon steel, and stainless steel, including types 201, 304, and 316, ensuring durability and robust performance.

Performance: Typically, grade 4.8 is manufactured using 1010 wire, and grade 8.8 with 1018 and 10B21 wire. Post hardening and dehydrogenation treatment, the bolt exhibits enhanced strength and toughness, effectively mitigating hydrogen embrittlement and fracture risks.

Application Area

Mechanical Manufacturing: Essential for connecting various mechanical equipment components, such as engines, transmissions, and machine tools, ensuring the stable and efficient operation of machinery.

Automotive Industry: Perfect for connecting elements like car chassis, engine mounts, and body structures, it withstands vibrations and impacts experienced during vehicle operation.

Electronic Appliances: Extensively applied in assembling electronic device casings, securing circuit boards, and more, facilitating easy disassembly and maintenance.

Furniture and Home Furnishings: Ideal for constructing furniture such as tables, chairs, cabinets, and wardrobes, enhancing structural sturdiness and reliability.

Installation and Use

Installation Method: Begin by positioning the flat washer around the bolt, then place the spring washer atop the flat washer. Proceed to screw the bolt into the threaded hole of the connected component, using a wrench or screwdriver to achieve a secure fit.

• Precautions: Confirm the compatibility of bolt, flat washer, and spring washer specifications during installation. Apply appropriate tightening torque to prevent the bolts from being overly tight or loose, ensuring optimal performance.