Simpson Metal-Panel Screw with EPDM Washer, #9 x 2", Type 316 Stainless Steel by Simpson Strong-Tie is engineered to fasten aluminum agricultural siding panels directly to wood joists - no pre-drilling required. Built from Type 316 stainless steel for exceptional resistance to corrosive environments, this hex-head screw combines a sharp point, twin-lead thread, and an EPDM washer to deliver a secure, weather-resistant connection in demanding outdoor and agricultural applications.

Key Features

• Type 316 Stainless Steel construction - withstands highly corrosive environments including moisture, chemicals, and harsh outdoor conditions where standard fasteners would fail
• Sharp point design - penetrates aluminum siding panels quickly without "point walking", eliminating the need for pre-drilling and saving installation time
• Twin-lead thread - securely fastens one to three panel thicknesses to a wood substrate in a single pass, reducing fastening effort and improving holding strength
• EPDM washer integrated into the hex head - creates a weatherproof seal at each fastening point, protecting against moisture intrusion through the panel face
• 1/4 in. hex drive - compatible with standard hex-drive power tools for fast, consistent installation across large panel runs
• 0.630 in. head diameter - distributes clamping load across the panel surface to prevent pull-through and maintain a flush, professional finish
• 2 in. length - sized to penetrate aluminum siding panels and bite securely into wood joists without over-driving

Why This Product

• Designed specifically for fastening aluminum agricultural siding to wood joists, this screw eliminates the pre-drilling step that slows down large panel installations - the sharp point drives directly through aluminum without wandering
• Type 316 stainless steel offers superior corrosion resistance in the most demanding outdoor and agricultural environments, making it the right choice where exposure to moisture, chemicals, or salt is a concern
• The twin-lead thread handles one to three panel thicknesses in a single fastening operation, giving installers flexibility across varying panel stack configurations without changing fasteners
• The integrated EPDM washer seals each penetration point as the screw is driven, reducing the risk of moisture infiltration through the panel face - an important detail for long-term weathertight performance on agricultural structures

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #9
• Length (in.): 2
• Head Diameter (in.): 0.630
• Head Type: Hex Head
• Drive Type: 1/4 in. Hex
• Thread Type: Twin Threads
• Point Type: Sharp Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• T09200HWAC: 100 Pk
• T09200HWAM: 1000 Pk

Approved Applications

• Fastening Siding to Wood

Frequently Asked Questions

Do these screws require pre-drilling before driving into aluminum siding panels?

No pre-drilling is required. The sharp point is designed to penetrate aluminum agricultural siding panels without pre-drilling and without point walking, making installation faster and more efficient on large panel runs.

What is the difference between Type 316 stainless steel and standard stainless steel fasteners?

Type 316 stainless steel contains a higher molybdenum content that provides enhanced resistance to corrosion in aggressive environments - including prolonged moisture exposure, chemical contact, and harsh outdoor conditions - compared to Type 304 stainless steel. This makes it well suited to agricultural and outdoor structural applications.

How many panel thicknesses can the twin-lead thread fasten in one pass?

The twin-lead thread is designed to fasten one to three panel thicknesses securely to a wood substrate in a single fastening operation, providing flexibility for installations involving stacked or overlapping aluminum siding panels.

What tool drive is needed to install these screws?

These screws use a 1/4 in. hex drive, which is compatible with standard hex-drive power screwdrivers and impact drivers commonly used in panel installation work.