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Simpson Strong-Tie Strong-Drive SDWS Timber 3/8-in x 4-in Stainless steel Exterior Structural wood screws

Name: Simpson Strong-Tie Strong-Drive SDWS Timber 3/8-in x 4-in Stainless steel Exterior Structural wood screws
Brand: Simpson Strong-Tie
SKU: 5001608915
Price: 5.98 USD
Availability: InStock
Rating: 5 (1 reviews)

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Designed to provide an easy-to-install, high-strength alternative to through-bolting and traditional lag screws. The Strong-Drive SDWS Timber screw is ideal for the contractor and do-it-yourselfer alike. It is code listed under IAPMO UES ER-192 and meets 2018 and 2021 IRC and IBC code requirements for several common wood framing and engineered-wood applications.

Fast installation - no predrilling, no counterboring, no heavy-duty equipment needed
Greater withdrawal resistance vs spikes
SawTooth point for fast starts and less driving torque without predrilling
Heavy-duty 0.275-in diameter shank provides strength and durability
Large 0.650-in diameter, flat washer head with nibs provides load-bearing area and seats flush with surface
Deep T50, 6-lobe recess for fewer cam-outs
Mid-shaft knurl aids in torque reduction
Length: 4-in
Type 316 stainless steel provides corrosion resistance even in severe conditions

General
Head Type	Round washer	Collection Name	Timber
Type	Structural wood screws	Contact Type Allowed	None
Use Location	Exterior	Package Quantity	1
Thread Type	Saw tooth	Manufacturer Color/Finish	Type 316 Stainless Steel
Material	Steel	Number of Pieces	1
Sub-Brand	N/A	Point Type	SawTooth Point
Finish	Stainless steel	Series Name	Strong-Drive SDWS
Measure Type	Standard (SAE)

Dimensions
Head Diameter (Inches)	0.65-in	Screw Thickness	3/8-in
Length Measurement	4-in	Package Weight (lbs.)	0.09

Features
Drive	6-lobe	Materials Fastened	Wood to wood
Collated	No	Multi-Material	No
Screw Thread Pitch	5

Certifications
CA Residents: Prop 65 Warning(s)	Prop 65 WARNING(S) -	ACQ Approved	Yes

Warranty
Warranty	None

Compatibility
For Use on Brick	No	For Use on Concrete	No
For Use on Composite	No	For Use on Drywall	No
For Use on Metal	No	For Use on Wood	Yes
For Use on Vinyl	No	For Use on Plastic	No

Miscellaneous
UNSPSC	31161500

Check out the Best Selling Wood Screws on Lowes.com

Review

5 out of 5

1 Review

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100% Recommend this product

Ratings may include incentivized customer reviews.

1 Customer Reviews

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Good screws

Would Recommend

They are lag screws. They are good and they are strong.

Toni JRMay 18, 2026
Verified Purchaser

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		Ratings	1
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