Simpson #6 x 1" Flat Head 316 Stainless Steel Marine Screw by Simpson Strong-Tie is engineered specifically for boat building and marine trade applications where corrosion resistance is non-negotiable. Crafted from Type 316 stainless steel, this fastener delivers the ultimate in protection against saltwater exposure, harsh chemicals, and severe marine environments. Whether you're attaching trim, rub rail, or molding to a fiberglass hull, or securing plywood and wood-substitute materials, this sharp-point screw drives quickly and holds firmly in high-density marine substrates.

Key Features

• Type 316 Stainless Steel material - provides superior resistance to saltwater, marine chemicals, and caustic conditions, making it ideal for long-term use in harsh outdoor and wet environments where standard steel fasteners would corrode and fail.
• High/Low Serrated Thread form with indentations ("teeth") - cuts easily and quickly through high-density materials like fiberglass and plywood composites, reducing drive effort and improving thread engagement for a secure, lasting hold.
• Extra-sharp point - speeds up screw starts during assembly, saving time and reducing the chance of surface damage when fastening into fiberglass boat hulls and wood-substitute materials.
• Flat head profile with 0.262" head diameter - sits flush with the surface for a clean, low-profile finish, ideal for trim, rub rail, and molding installations where appearance and smooth edges matter.
• #2 Phillips drive - compatible with standard Phillips bits and drivers, making this fastener easy to use with common tools already on the boat or in the shop.
• Fully threaded at 1" length - screws at this length are threaded along the entire shank, maximizing grip and pull-out resistance when fastening into thinner or layered materials.
• 0.138" shank diameter (#6 screw size) - sized appropriately for trim and molding work, offering adequate strength without splitting or cracking delicate fiberglass or composite surfaces.

Why This Product

• Purpose-built for marine environments - Type 316 stainless steel is specifically chosen for applications exposed to seawater and chemically caustic conditions, going beyond standard stainless options to protect against the demanding conditions of boat building and marine maintenance.
• Engineered to fasten fiberglass, plywood, and wood-substitute materials - the high/low serrated thread design is purpose-matched for the high-density substrates common in marine construction, where standard wood screws can strip out or fail to seat properly.
• Ideal for trim, rub rail, and molding applications on fiberglass hulls - the flat head seats flush, the sharp point starts without pre-drilling in many applications, and the 316 stainless finish ensures the fastener won't stain or corrode the surrounding gelcoat or composite surface over time.
• From Simpson Strong-Tie's dedicated marine fastener line - this screw is part of a broad range of fasteners developed specifically for boat building and marine trade professionals who require consistent, reliable performance in corrosive exposure conditions.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #6
• Length (in.): 1
• Head Type: Flat Head
• Head Diameter (in.): 0.262
• Shank Diameter (in.): 0.138
• Drive Type: #2 Phillips
• Thread Type: High/Low Serrated Threads
• Point Type: Sharp Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• T06J100FXC: 100 Pk
• T06J100FXM: 1000 Pk

Approved Applications

• Fastening Wood-to-Wood
• Marine applications including boat building and marine trade use
• Fastening trim, rub rail, and molding to fiberglass boat hulls
• Securing fiberglass, plywood, and wood-substitute materials in corrosive or chemically caustic environments

Frequently Asked Questions

What materials can this marine screw fasten into?

This screw is designed to fasten securely in fiberglass, plywood, and wood-substitute materials. Its high/low serrated thread form cuts quickly through high-density substrates, making it well-suited for marine construction and repair applications involving these materials.

Why is Type 316 stainless steel used instead of standard stainless steel for marine fasteners?

Type 316 stainless steel offers superior corrosion resistance compared to standard stainless grades, particularly in environments exposed to saltwater and chemically caustic conditions. This makes it the preferred material for marine and boat building applications where long-term durability is critical.

Is this screw fully threaded?

Yes - at a 1" length, this screw is fully threaded along the entire shank. This maximizes thread engagement and pull-out resistance when fastening into thinner or layered marine materials such as plywood, fiberglass panels, or wood-substitute substrates.

What drive type does this screw use, and what tool is needed?

This screw uses a #2 Phillips drive, which is compatible with standard #2 Phillips bits and drivers - tools commonly found in most workshops and on most job sites. The extra-sharp point also helps speed up screw starts during installation, reducing the need for pre-drilling in many applications.

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