Durable Round Head Bolt for Manufacturing with Three-Month Guarantee

• Customization: Available
• Material: Stainless Steel
• Type: Round Head
• Model NO.: 1-1
• Groove: Flower
• Connection: Common Bolt
• Head Style: Round
• Standard: DIN
• Grade: 6.8
• Surface Treatment: Whitewash
• Applicable Industries: Construction, Manufacturing
• After-Sales: Three Months
• Whether to Support Customization: Support
• Transport Package: Container Loading
• Specification: 1-30
• Trademark: Huilin
• Origin: Handan, Hebei
• HS Code: 0101101010
• Production Capacity: 50000

Product Description

Round Head Torx Screws ® (Socket Screws)

1. Head Design: Ingeniously Crafted Round Head with Distinct Plum Blossom Groove

Round Head Features:

• Hemispherical Top: This design, with a diameter typically 1.5-2 times that of the screw, masterfully disperses stress. For instance, a round head measuring 6-8mm in diameter for a 4mm screw. This prevents surface scratching while eliminating sharp corners.

Embedded Design: A seamless transition radius between head and rod, measuring ≥ 0.5mm, minimizes stress concentration. Ideal for vibration-prone environments such as mechanical and sports equipment.

• Plum Blossom Trough (Torx) ® / Star-Shaped Slot:

Hexagonal Star-Shaped Groove: Exceptional torque transmission is realized using a specialized batch head (like T10-T25). This design enhances anti-slip capabilities by over 60% compared to traditional cross grooves, perfect for high-speed electric tool installations (recommended speed ≤ 2800RPM).

Anti-Overload Design: Featuring positioning ribs within the groove, this design ensures that when torque surpasses the intended threshold, both the ribs and batch head undergo elastic deformation, effectively preventing head breakage.

2. Thread and Stem Characteristics

• Thread Type:

Self-Tapping Thread (ST Series): Equipped with 3-4 cutting edges on the tip, these threads effortlessly penetrate thin metal plates (≤ 2mm thick) or plastics without the need for pre-drilled holes.

Machine Thread (M Series): Designed for use with nuts or pre-threaded holes, these threads are ideal for high-load applications, such as in steel structures or automotive parts.

• Material and Coating:

Carbon Steel (10B21/45# Steel): Post heat-treatment, these achieve a hardness of HRC35-40, making them suitable for standard indoor loads.

Stainless Steel (304/316): Renowned for outstanding corrosion resistance, making it perfect for outdoor or high-humidity environments, such as in food machinery and medical equipment.

• Surface Coating Options:

Galvanized (Blue White/Color Zinc): Withstands salt spray tests for ≥ 48 hours, meeting general industrial rust prevention standards.

Nickel-Based Alloy Coating: Offers salt spray resistance for ≥ 1000 hours, making it ideal for marine or chemically corrosive environments.