Hebei Shijing Changtian Metal structure products Co., LTD

Round Head Screw Galvanized Truss HeadSelf-drilling Screw

Round Head Screw Galvanized Truss HeadSelf-drilling Screw

$0.031000-4999 Piece/Pieces

$0.025000-9999 Piece/Pieces

$0.01≥10000Piece/Pieces

Payment Type:	T/T
Incoterm:	FOB
Transportation:	Ocean
Port:	Tianjin,Shanghai

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Product Description

Product Attributes

Brand: ShiJingChangTian

Finish: Zinc plated

Head Style: Truss

Color: Silver

Service: OEM ODM

Packaging & Delivery

Selling Units	:	Piece/Pieces
Package Type	:	We will pack and ship according to customer's requirements

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Truss self-drilling screws

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Product Description

Round Head Screw Galvanized Truss HeadSelf-drilling Screw

Galvanized Truss Self-Drilling Screws are premium fasteners engineered for high-strength, corrosion-resistant applications in construction,舞台桁架 systems, solar installations, and industrial projects. These screws combine the durability of galvanized steel with a self-drilling design, eliminating the need for pre-drilling and significantly reducing installation time. Ideal for securing metal-to-metal or metal-to-wood connections, they ensure reliable performance in demanding environments.

Created from high-grade carbon steel and coated with a thick zinc layer (electroplated or hot-dip galvanized), these screws offer exceptional resistance to rust, moisture, and chemical exposure. Their sharp drill point and aggressive thread design enable quick penetration into hard materials like steel, aluminum, and hardwood, ensuring a secure, vibration-resistant hold.

Key Features

1. Superior Corrosion Resistance

The zinc coating provides a robust barrier against oxidation, making these screws suitable for indoor and outdoor applications. Hot-dip galvanized variants (optional) deliver enhanced protection for harsh environments (e.g., coastal areas, chemical plants). With a typical zinc thickness of 8–12 microns, they withstand ASTM B117 salt spray tests for 500+ hours without red rust.

2.Self-Drilling Efficiency

Equipped with a hardened drill point (HRC 50–55), these screws eliminate the need for pilot holes, reducing labor costs by up to 30%. The flute design effectively removes debris during drilling, preventing thread stripping and ensuring smooth installation.

3. High Load-Bearing Capacity

- Tensile Strength: 800–1,000 MPa

- Shear Strength: 600–750 MPa

The hardened steel core and deep threads provide excellent grip strength, ideal for dynamic loads

4. Versatile Head & Drive Options

- Head Styles: Hex washer head, pan head, or countersunk head for flush finishes.

- Drive Types:Phillips, Pozidriv, or Torx (T15/T20/T25) to prevent cam-out under high torque.

The hex washer head distributes pressure evenly, reducing surface damage and improving sealing.

5. Wide Size Range

Available in diameters from #8 to 1/4 inch (4.2mm–6.3mm) and lengths from 1/2" to 6" (12mm–150mm), customizable for specialized projects.

6. Compliance & Certification

Meets ISO 9001, ASTM F1514, and DIN 7504 standards. RoHS-compliant and REACH-certified for EU markets.