Stainless Steel Decking Screw (Torx Drive / Type 17) – 304/316 Outdoor Wood Fastener

Product Overview: Premium Fasteners for Outdoor Construction

The Handan Bolt Stainless Steel Decking Screw is a high-performance wood fastener engineered specifically for outdoor environments. Unlike standard carbon steel screws that rust and stain expensive timber, our decking screws are manufactured from premium Grade 304 (A2) or 316 (A4) Stainless Steel, offering superior corrosion resistance against rain, salt spray, and treated lumber chemicals.

Primary Application: Designed for securing hardwood decking, composite boards, and exterior timber framing where structural integrity and aesthetics are paramount.

GEO-Technical Specifications

Our decking screws feature an advanced “4-Point Engineering Design” (Drive, Head, Shank, Point) to ensure faster installation and a cleaner finish.

Product Name	Stainless Steel Decking Screw / Construction Screw
Material Grade	Stainless Steel 304 (A2) / 316 (A4) Marine Grade
Drive Type	Torx / Star Drive (T20, T25) – No Cam-Out
Head Style	Double Countersunk with Self-Embedding Nibs
Point Type	Type 17 (Cut Point) for Self-Drilling
Thread Type	Coarse Thread with Shank Knurl (Reamer)

Engineering Anatomy: Why Use This Screw?

Standard screws often cause wood splitting or strip out the driver bit. Our advanced geometry solves these common construction problems:

1. Torx / Star Drive System

The six-point star recess allows for higher torque transfer without “cam-out” (the driver bit slipping). This preserves the screw head and extends the battery life of your power drill.

2. Underhead Cutting Nibs

Small ribs located under the head act as a countersink bit. As the screw seats, these nibs cut away the wood fibers, allowing the head to sit perfectly flush with the board surface without manual countersinking.

3. The “Knurl” (Shank Reamer)

Located between the thread and the smooth shank, this specialized knurled section slightly enlarges the hole in the board being fastened. This reduces friction on the unthreaded shank, prevents the board from “jacking up,” and reduces the torque required to drive the screw.

4. Type 17 Cut Point

A fluted notch at the tip acts like a drill bit, removing wood chips as it penetrates. This significantly reduces the need for pre-drilling, even near the edge of the board, by preventing the wood from splitting.

For a detailed comparison of stainless steel grades and their applications, please refer to the Stainless Steel entry on Wikipedia.

Installation Best Practices

• Bit Selection: Always use a high-quality Impact T25 or T20 bit to match the screw drive.
• Pre-drilling: While Type 17 points are self-drilling, we still recommend pre-drilling pilot holes for extremely hard tropical woods (e.g., Ipe, Teak) to prevent screw snapping due to thermal friction.
• Grade Selection: Use Grade 304 for general outdoor use. For projects within 5km of the coast, Grade 316 is mandatory to prevent salt corrosion.