Simpson #8 x 1 3/4 Gray Composite Fascia Screws in Type 316 Stainless Steel are purpose-built fasteners designed for secure, clean attachment of composite and PVC fascia boards - including Trex fascia boards - in demanding outdoor environments. Engineered by Simpson with a low-profile pancake head, a Type-17 point, and severe-level corrosion resistance, these screws deliver a professional finish that holds firmly without damaging the fascia surface, making them a reliable choice for both coastal and high-exposure installations.

Key Features

• Approved for Trex fascia board attachment - meets the requirements for composite fascia installations, giving you confidence the fastener is suited to the application.
• Deep T-20 6-lobe recess - reduces cam-outs during driving so the bit stays engaged and the surrounding fascia surface stays undamaged (compatible bit part number: BIT20T-2-RC3).
• Type-17 point - cuts into material quickly for fast, clean starts without pre-drilling in most fascia applications.
• Low-profile pancake head - resists pullover and seats flush against the fascia surface for a smooth, finished appearance.
• Type 316 stainless steel construction - provides severe-level corrosion resistance, keeping fasteners sound and stain-free in harsh outdoor and coastal conditions.
• Gray head color - blends with common gray composite fascia tones for a cleaner, less visible fastener after installation.

Why This Product

• Built specifically for composite fascia work - with Trex fascia board approval and compatibility with PVC trim and fascia applications, this screw is matched to the exact demands of composite exterior finishing rather than being a general-purpose fastener adapted to the job.
• Engineered to prevent cam-out and surface damage - the deep T-20 6-lobe recess keeps the bit seated under torque, reducing the slipping that mars fascia surfaces and slows installation.
• Severe-level corrosion resistance where it matters most - Type 316 stainless steel holds up in coastal, humid, and high-moisture environments where lesser materials would corrode, rust, and stain the fascia face over time.
• Includes the driver bit so you can start immediately - the matching T-20 6-lobe driver bit is included, eliminating a separate purchase and ensuring the correct bit is on hand from the first screw driven.

Specifications

• MPN: T08175FS75GR
• Screw Size: #8
• Length: 1-3/4 in.
• Head Type: Pancake Head
• Head Diameter: 0.400 in.
• Drive Type: T-20 6-Lobe
• Thread Type: Coarse Threads
• Point Type: Type-17 Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Head Color: Gray
• Packaging: Packs of 75 and Cartons of 375

Approved Applications

• PVC Trim and Fascia
• Composite fascia board installations

Install With

• Includes T-20 6-lobe driver bit, part number BIT20T-2-RC3.
• Install with Simpson Strong-Tie Fascia Counterbore Bit (sold separately)

Frequently Asked Questions

Are these screws approved for use with Trex fascia boards?

Yes. The Simpson T08175FS75GR is specifically approved for the attachment of Trex Fascia Boards, making it a trusted choice for composite fascia installations.

What type of corrosion resistance do these screws provide?

These screws are manufactured from Type 316 stainless steel, which provides severe-level corrosion resistance - ideal for demanding outdoor and coastal environments.

What drive type is required to install these screws?

These screws require a T-20 6-lobe driver. A compatible T-20 6-lobe driver bit (part number BIT20T-2-RC3) is included. The deep 6-lobe recess is specifically designed to reduce cam-outs during installation.

Why is a pancake head used on these fascia screws?

The low-profile pancake head design resists pullover, ensuring the screw seats flush against the fascia surface and delivers a clean, professional finish without damaging the board material.

Related Products

• Counterbore Bit FSBIT