Simpson #8 x 3/4" Pan Head, 316 Stainless Steel Marine Screw

Simpson #8 x 3/4" Pan Head 316 Stainless Steel Marine Screw from Simpson Strong-Tie is purpose-built for boat building, marine trade, and any fastening application where long-term corrosion resistance is critical. Engineered to drive securely into fiberglass, plywood, and wood-substitute materials, this screw delivers a strong, lasting hold in saltwater, spray, and chemically demanding environments. The pan head profile keeps hardware low-profile against the surface while the #2 Phillips drive makes installation fast and consistent - making it a trusted choice for professionals applying trim, rub rail, and molding to fiberglass boat hulls.

Key Features

• Type 316 Stainless Steel material and finish - provides superior resistance to saltwater, chlorides, and harsh chemicals, making this screw reliable in marine and coastal environments where standard fasteners would corrode and fail.
• High/Low Serrated Thread design - the alternating thread form with built-in indentations cuts quickly through high-density materials like fiberglass and plywood, reducing driving effort and improving thread engagement for a secure hold.
• Sharp point tip - speeds up screw starts during assembly, reducing the need for pre-drilling in many applications and helping installers work faster without sacrificing accuracy.
• Pan head with 0.314 in. head diameter - distributes clamping force over a broader surface area, holding trim, molding, and rub rail material firmly without pulling through or damaging softer composite surfaces.
• #2 Phillips drive - compatible with standard Phillips bits for fast, familiar installation using common hand or power tools already on the job.
• 3/4 in. length with 0.164 in. shank diameter - sized for thin-panel and trim fastening applications where a short, precise screw is needed to attach material without punching through the substrate.

Why This Product

• Built specifically for marine-grade corrosion protection - Type 316 stainless steel goes beyond standard stainless grades by resisting the chloride-heavy conditions found in saltwater boating environments, meaning fasteners stay secure and rust-free over the long term.
• Optimized for fiberglass and composite boat construction - the high/low serrated thread form and sharp point are specifically engineered to bite into fiberglass and wood-substitute materials without splitting or stripping, which is critical when fastening rub rail, trim, and molding to boat hulls.
• Pan head design suits surface-applied trim work - the wide, flat-bottomed pan head sits flush against the workpiece and spreads load evenly, reducing the risk of pull-through when securing molding or decorative components to fiberglass panels.
• From a trusted fastener manufacturer in the marine trade - Simpson Strong-Tie designs these screws as part of a dedicated product line for boat building and marine applications, giving buyers confidence in the specification and performance of every fastener.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length: 3/4 in.
• Head Type: Pan Head
• Head Diameter: 0.314 in.
• Shank Diameter: 0.164 in.
• Drive Type: #2 Phillips
• Thread Type: High/Low Serrated Threads
• Point Type: Sharp Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel

Available Pack Options

• T08J075PXC: 100 Pk
• T08J075PXM: 1000 Pk

Approved Applications

• Marine fastening - boat building and marine trade applications requiring maximum corrosion resistance
• Fastening wood-to-wood, plywood, and wood-substitute materials in moisture-exposed conditions
• Applying trim, rub rail, and molding to fiberglass boat hulls

Frequently Asked Questions

What materials can this screw fasten into?

This marine screw is designed to fasten securely into fiberglass, plywood, and wood-substitute materials - making it well-suited for boat hull construction, trim installation, and composite panel fastening in marine settings.

Why is Type 316 stainless steel preferred over other grades for marine use?

Type 316 stainless steel contains molybdenum, which gives it enhanced resistance to chlorides and saltwater compared to standard stainless grades. This makes it the material of choice for boat building and marine trade applications where fasteners are regularly exposed to harsh, corrosive environments.

What is the purpose of the high/low serrated thread on this screw?

The high/low serrated thread incorporates alternating thread heights with indentations that cut quickly and easily through high-density materials like fiberglass and composite substrates. This reduces driving resistance and improves holding strength compared to conventional thread forms in these challenging materials.

Are there other head styles available for this marine screw?

Yes - in addition to the pan head style, this Simpson marine screw is also available in a flat head configuration, providing options depending on whether a flush-mount or low-profile surface installation is required.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description above for specifications.