Simpson #12 x 2" Pan Head 316 Stainless Steel Marine Screw from Simpson Strong-Tie is a precision-engineered fastener built for boat building, marine trade, and any application demanding the ultimate in corrosion protection. Crafted from Type 316 stainless steel, this screw is designed to resist saltwater, harsh chemicals, and the most punishing coastal environments - making it the go-to choice for professionals fastening trim, rub rail, and molding to fiberglass boat hulls, as well as securing components in plywood and wood-substitute materials. The pan head profile, sharp point, and high/low serrated thread form combine to deliver fast, reliable installation even in high-density substrates.

Key Features

• Type 316 Stainless Steel material - provides superior resistance to saltwater, corrosion, and chemically caustic conditions, making this screw ideal for marine and boat building applications where ordinary fasteners would fail prematurely.
• High/Low Serrated Thread form - the engineered thread incorporates indentations ("teeth") that cut easily and quickly through high-density materials like fiberglass and wood-substitute composites, reducing installation time and effort.
• Extra-sharp point - speeds screw starts during assembly, reducing the need for pre-drilling in many applications and improving overall assembly efficiency on the job.
• Pan head profile with 0.416 in. head diameter - provides a broad, low-profile bearing surface that seats flush and securely against trim, rub rail, and molding without sinking into or damaging delicate fiberglass surfaces.
• #3 Phillips drive - compatible with standard #3 Phillips bits, ensuring a secure driver engagement that reduces cam-out and allows consistent torque application across repeated fastenings.
• 2" length with 0.216 in. shank diameter - sized to deliver dependable holding strength through typical marine trim and hull materials without overdriving or splitting the substrate.

Why This Product

• Specifically engineered for fiberglass boat hull applications - the high/low serrated thread form and sharp point penetrate fiberglass, plywood, and wood-substitute materials cleanly, which means faster installation and a secure, lasting hold where standard wood screws would strip or corrode.
• Type 316 stainless steel goes beyond basic rust resistance - it is formulated to withstand prolonged saltwater exposure and chemically caustic environments, making it the appropriate material choice for marine trade professionals who cannot afford fastener failure on the water.
• Pan head geometry is purpose-matched to marine trim work - the wide, flat bearing surface distributes clamping load evenly across rub rail and molding, reducing the risk of surface damage to fiberglass hulls during fastening.
• Simpson Strong-Tie's dedicated marine fastener line means this screw is not a repurposed general-use product - it is designed from the thread form up for the specific demands of boat building and marine trade environments.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #12
• Length (in.): 2
• Head Type: Pan Head
• Head Diameter (in.): 0.416
• Shank Diameter (in.): 0.216
• Drive Type: #3 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

• T12J200PX-RP6: 6 Pk
• T12J200PXC: 100 Pk
• T12J200PXM: 1000 Pk

Approved Applications

• Fastening trim, rub rail, and molding to fiberglass boat hulls
• Boat building and marine trade construction
• Securing components in plywood and wood-substitute materials exposed to marine or chemically caustic conditions
• Any fastening application requiring the ultimate in corrosion protection

Frequently Asked Questions

Why is Type 316 stainless steel specified for marine screws instead of Type 304?

Type 316 stainless steel contains molybdenum, which gives it significantly enhanced resistance to saltwater, chlorides, and chemically caustic environments compared to standard stainless grades. For boat building and marine trade applications where fasteners are in constant contact with seawater and harsh conditions, Type 316 is the material specified for the ultimate in corrosion protection - which is exactly why Simpson Strong-Tie uses it for this marine screw.

What materials can this screw be driven into?

This marine screw is designed to fasten securely in fiberglass, plywood, and wood-substitute materials. The high/low serrated thread form with its sharp point is engineered to cut through high-density materials quickly and cleanly, making it well-suited for attaching trim, rub rail, and molding to fiberglass boat hulls.

What drive tool is required to install this screw?

This screw uses a #3 Phillips drive, which is the standard driver size for #12 screws. A #3 Phillips bit - used with a hand screwdriver or power driver - is all that is needed to install this fastener. Using the correct driver size helps maintain proper engagement and reduces the risk of cam-out during installation.

Is this screw available in a flat head style as well?

Yes. According to Simpson Strong-Tie product information, this marine screw is also available in a flat head configuration. The flat head version suits applications where a flush or countersunk finish is preferred, while the pan head version covered here provides a broad bearing surface that seats on top of the material.

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