Simpson #10 x 1-1/4" Pan Head 316 Stainless Steel Marine Screw by Simpson Strong-Tie is an 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 resists saltwater exposure, harsh chemicals, and the punishing conditions found in marine environments - making it a dependable choice for fiberglass, plywood, and wood-substitute materials alike.

Key Features

• Type 316 Stainless Steel material - provides the highest level of corrosion resistance among standard stainless alloys, standing up to saltwater, humidity, and chemically caustic environments where lesser fasteners fail
• High/Low Serrated Threads - the engineered thread form incorporates serrated indentations that cut quickly through high-density materials such as fiberglass and composite substrates, reducing drive effort and improving holding power
• Pan Head profile with 0.365 in. head diameter - distributes clamping force over a broader surface area, ideal for securing trim, rub rail, and molding to fiberglass boat hulls without countersinking
• Sharp Point tip - speeds screw starts during assembly, reducing layout time and the need for pre-drilling in many materials
• #2 Phillips drive - compatible with standard Phillips bits and drivers already on the job, making the screw easy to install with common tools
• 1-1/4 in. length with 0.190 in. shank diameter - sized to deliver a secure, low-profile attachment in layered fiberglass and plywood assemblies without over-penetrating thin substrates

Why This Product

• For boat builders and marine trade professionals, the Type 316 stainless steel construction means this fastener will not rust, pit, or stain fiberglass surfaces even after prolonged saltwater and chemical exposure - protecting both the fastener and the finished appearance of the vessel
• The high/low serrated thread pattern is purpose-engineered for fiberglass and composite materials, giving installers a fast, secure bite where standard wood screws often strip out or spin
• The pan head style makes this screw the right choice when applying trim, rub rail, and molding to fiberglass hulls - sitting flush against the surface without requiring a countersink or recess
• Simpson Strong-Tie designs this screw specifically for the marine and boat building trades, meaning it is engineered to perform in the exact applications where corrosion resistance and reliable fastening in high-density materials matter most

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length (in.): 1 1/4
• Head Type: Pan Head
• Head Diameter (in.): 0.365
• Shank Diameter (in.): 0.190
• 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

• T10J125PXC: 100 Pk
• T10J125PXM: 1000 Pk

Approved Applications

• Fastening in fiberglass boat hulls and marine structures
• Applying trim, rub rail, and molding to fiberglass surfaces
• Fastening into plywood in marine and saltwater environments
• Fastening into wood-substitute and composite materials in applications requiring maximum corrosion protection
• Boat building and marine trade assembly work
• Applications exposed to harsh chemicals or caustic conditions

Frequently Asked Questions

Why is Type 316 stainless steel recommended for marine fasteners?

Type 316 stainless steel offers superior resistance to saltwater, moisture, and many harsh chemicals compared to standard stainless grades. This makes it the preferred material for boat building and marine trade applications where fasteners are continuously exposed to corrosive conditions. Simpson Strong-Tie selected this material specifically to provide the ultimate in corrosion protection for marine assemblies.

What materials can this screw fasten into?

This marine screw is engineered to fasten securely into fiberglass, plywood, and wood-substitute materials. The high/low serrated thread design allows it to cut cleanly and quickly through high-density substrates commonly found in boat building and marine applications.

Is a pan head the right choice for trim and rub rail installation?

Yes - the pan head profile sits flat against the surface without requiring a countersink or recess, making it ideal for applying trim, rub rail, and molding to fiberglass boat hulls. The 0.365 in. head diameter also provides good clamping surface area to hold components securely in place.

Does this screw come in other head styles?

According to Simpson Strong-Tie, these stainless steel marine screws are also available in a flat head style, giving installers flexibility based on whether a flush or low-profile above-surface installation is needed for a particular application.

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