Simpson Metal-Panel Screw with EPDM Washer, #9 x 1-1/2 in., 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, these hex-head screws are formulated to hold up in highly corrosive outdoor environments where standard fasteners would fail, making them a reliable choice for agricultural buildings, metal panel installations, and coastal or high-moisture applications.

Key Features

• Sharp point tip - penetrates aluminum panels quickly without pre-drilling, saving installation time and reducing the risk of panel misalignment during fastening
• Twin-thread design - drives through one to three panel thicknesses and locks securely into wood substrate, reducing the chance of panel pull-through or loosening over time
• Type 316 stainless steel construction - provides outstanding resistance to saltwater, chemicals, and corrosive outdoor environments where standard zinc or 304-grade fasteners would deteriorate prematurely
• 1/4 in. hex drive head - compatible with standard hex-drive power tools for fast, consistent installation across large panel runs
• Hex head with 0.630 in. diameter - provides a wide, stable bearing surface that distributes clamping force evenly across the panel face
• EPDM washer integrated into design - creates a weather-resistant seal at the fastening point, helping prevent moisture intrusion through the panel penetration

Why This Product

• Eliminates pre-drilling on aluminum agricultural siding panels - the sharp point tip is specifically designed for direct penetration, reducing labor steps and speeding up installation on large-scale panel projects
• Type 316 stainless steel is the right material choice for installations in highly corrosive settings - including coastal regions, agricultural facilities, and areas exposed to chemicals or persistent moisture - where lesser fastener materials would corrode and fail
• The twin-thread design is purpose-built to grip wood joists firmly through multiple panel thicknesses, providing a secure, long-lasting connection between metal siding panels and the structural substrate beneath
• Simpson Strong-Tie designs these fasteners specifically for metal panel applications, giving installers confidence that the screw geometry, thread form, and material selection are matched to the demands of aluminum panel-to-wood connections

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #9
• Length: 1-1/2 in.
• Head Type: Hex Head
• Head Diameter: 0.630 in.
• 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

• T09150HWA-RP5: 5 Pk
• T09150HWA-RP25: 25 Pk
• T09150HWAC: 100 Pk
• T09150HWAM: 1000 Pk

Approved Applications

• Fastening aluminum agricultural siding panels to wood joists without pre-drilling

Frequently Asked Questions

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

No. These metal-panel screws feature a sharp point specifically designed to penetrate aluminum agricultural siding panels without the need for pre-drilling, making installation faster and more straightforward on large panel projects.

Why is Type 316 stainless steel used instead of standard stainless steel for these screws?

Type 316 stainless steel offers superior resistance to corrosion in highly demanding environments - including exposure to saltwater, chemicals, and persistent moisture - making it the appropriate material choice for agricultural, coastal, and other corrosive outdoor settings where standard fasteners would degrade over time.

How many panel thicknesses can the twin-thread design fasten securely?

The twin-lead thread design is engineered to fasten one to three panel thicknesses securely to a wood substrate, giving installers flexibility when working with varying aluminum siding panel configurations.

What tool is needed to drive these metal-panel screws?

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