Simpson Strong-Tie #7 x 1-5/8" Trim-Head Screw is a square-drive stainless steel fastener engineered for deck board installation and boardwalk construction. Built from Type 305 stainless steel, this trim-head screw delivers lasting corrosion resistance in high-moisture and marine-adjacent environments where ordinary fasteners would fail. The low-profile trim head keeps deck surfaces looking clean and polished, while the #1 square drive provides slip-free engagement that reduces cam-out during installation. Whether you're fastening wood deck boards to joists or securing boardwalk planking, this screw is designed to hold tight and look great doing it.

Key Features

• Type 305 Stainless Steel material - provides superior corrosion resistance in wet, coastal, and high-exposure outdoor environments where carbon steel fasteners degrade quickly
• Trim-style head with 0.230" head diameter - sits low and flush with the decking surface so fastener heads stay subtle and unobtrusive for a cleaner finished appearance
• #1 Square drive - delivers secure, slip-free bit engagement during driving, reducing cam-out and installer fatigue on large deck projects
• Type-17 point - self-drilling tip bites into wood immediately for fast starts without pre-drilling in most applications, speeding up installation
• Coarse threads on approximately two-thirds of the shank - draw deck boards tightly down to framing joists as the screw is driven, producing a firm, gap-free surface
• Driver bit included - replacement bit part number BIT1S-2-R2 means you have what you need to start right away, and know exactly what to order when the bit wears

Why This Product

• Built for outdoor longevity - Type 305 stainless steel resists rust and corrosion in damp, marine, and weathered environments where dock, boardwalk, and deck applications demand reliable long-term performance from every fastener
• Clean surface results without extra work - the low-profile trim head sits flush naturally, eliminating the need to countersink or fill fastener heads after installation for a polished deck finish
• Faster, more controlled driving - the combination of the Type-17 self-starting point and the #1 square drive means quick starts and confident driving with minimal slippage or blowout on deck and boardwalk framing
• Engineered tight-pull performance - coarse threads covering roughly two-thirds of the shank actively pull boards snug against joists as the screw seats, helping to close gaps and create a tight, stable deck surface

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length: 1-5/8 in.
• Head Type: Trim Head
• Head Diameter: 0.230 in.
• Drive Type: #1 Square
• Thread Type: Coarse Threads
• Point Type: Type-17 Point
• Material: Type 305 Stainless Steel
• Finish: Type 305 Stainless Steel
• Approx. Count per Lb.: 195
• Country of Origin: Taiwan

Available Pack Options

• S07162FB1: 1 LB - includes Driver bit included; replacement bit part number: BIT1S-2-R2
• S07162FB5: 5 LB - includes Driver bit included; replacement bit part number: BIT1S-2-R2
• S07162FBB: 4000 Pk - includes Driver bit included; replacement bit part number: BIT1S-2-R2

Approved Applications

• Decks - Deck Boards Wood
• Dock and Boardwalk

Frequently Asked Questions

Why is Type 305 stainless steel recommended for deck and dock applications?

Type 305 stainless steel offers strong corrosion resistance, making it well suited for use in outdoor, high-moisture, and marine-adjacent environments such as wood decks, docks, and boardwalks where fasteners are regularly exposed to rain, humidity, and weathering. Carbon steel fasteners corrode in these conditions and can stain or weaken the surrounding wood over time.

Does this screw require pre-drilling before installation?

The Type-17 point is designed to allow fast starts without pre-drilling in most wood decking applications. However, pre-drilling is recommended near board ends to help prevent wood splitting.

What is the purpose of the coarse threads on only part of the shank?

Coarse threads on approximately two-thirds of the lower shank are engineered to pull deck boards tightly down against the joists as the screw is driven. The unthreaded upper shank portion allows the fastener to clamp the board firmly to the framing for a secure, stable hold.

Can this screw be used with a Quik Drive auto-feed system?

This particular trim-head screw is designed for hand-drive use with a square drive bit. Simpson Strong-Tie also offers collated square-drive versions of trim-head screws that are compatible with the Simpson Strong-Tie Quik Drive auto-feed screw driving systems - those are separate products.