Durable Hexagon Socket Bolt for Reliable Manufacturing and Construction Tasks

• Customization: Available
• Material: Stainless Steel
• Type: Round Head
• Model NO.: 1-1
• Connection: Common Bolt
• Head Style: Round
• Standard: DIN
• Grade: 4.8
• Application: Building
• Use: Fastening Connection
• Thread Type: Full Thread
• Applicable Industries: Construction, Manufacturing
• After-Sales: Three Months
• Transport Package: Container
• Specification: 1-100
• Trademark: Huilin
• Origin: Handan, Hebei
• HS Code: 0101101010
• Production Capacity: 50000

Product Description

The Cup Head Hexagon Screw, also referred to as the Cylindrical Head Hexagon Screw, stands as a quintessential mechanical fastener. Below is an in-depth elucidation of its attributes:

1, Appearance and Structure

• Head shape: The head of the hexagon screw, residing within the cup head, is meticulously cylindrical. It features a precise hexagonal aperture at the top, designed for seamless integration with a hex wrench during installation.

Side design: The screw head is crafted with a subtle curvature along its side, ensuring not only an aesthetically pleasing appearance but also enhancing the tactile experience during installation.

Internal hexagonal hole: The internal hexagonal cavity is meticulously engineered to perfectly complement the head's height. This guarantees a stable and unwavering grip for the wrench, minimizing the risk of slippage.

2, Dimensions and Specifications

Head size: Typically, the head diameter of cup head screws surpasses the thread by 2-3 millimeters, effectively preventing tool slippage during installation. The head height is generally about 0.6 to 1 times the thread diameter.

Thread specifications: The screw thread is crafted to align with either metric or imperial standards. For instance, a metric thread M6 × 1.0 signifies threads with a 6-millimeter diameter and 1-millimeter pitch, while British standards such as 1/4"-20 denote a 1/4 inch diameter with 20 threads per inch.

Common specifications: Metric sizes span from M3 to M20, with lengths varying from 5mm to 200mm. Imperial sizes offer a plethora of alternatives as well.

3, Material and Strength

Material selection: The hexagonal screws in cup heads are crafted from a diverse array of materials, including carbon steel, stainless steel (304, 316), and alloy steel (such as SCM435).

Carbon steel: Although economically favorable, it offers limited rust resistance, making it apt for general usage scenarios.

Stainless steel: Renowned for its superior corrosion resistance, it is ideal for moist or chemical-prone environments, though it possesses a slightly lower strength profile.

Alloy steel: This variant, post heat treatment, boasts exceptional strength and is widely utilized in automotive and heavy-duty industrial domains.

• Strength grade: Screws are classified by strength grades like 8.8 (tensile strength 800MPa, yield strength 640MPa) or 12.9 (tensile strength 1200MPa). Higher grades correlate with an enhanced load-bearing capacity.

4, Surface Treatment

Popular surface treatments encompass galvanizing (electroplating, hot-dip), blackening, Dacromet coating, and nickel plating.

Galvanized: Electroplated for a silver-white hue with a 5-8 micron thickness; Hot-dip offers a gray-white finish with 20-30 microns, enhancing rust resistance but with a rougher texture.

Blackening treatment: This involves forming a black oxide layer through high-temperature oxidation, offering standard rust protection at a lower cost.

Dacromet coating: Displays a gray finish, offering over 500 hours of salt spray resistance, making it apt for marine applications.

Nickel plating: Exhibits a bright silver luster, balancing rust protection with wear resistance, making it ideal for precision instruments.

5, Application

Application scenarios: The hexagonal screws within cup heads excel in high clamping force or tight space scenarios, including mechanical manufacturing, electronics, automotive, marine, aerospace, and more.