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FastenMaster 3/8-in x 8-in Black Galvanized/Coated Flat -Head Exterior Structural wood screws 50 -Pack

Name: FastenMaster 3/8-in x 8-in Black Galvanized/Coated Flat -Head Exterior Structural wood screws 50 -Pack
Brand: FastenMaster
SKU: 1000694612
Price: 56.98 USD
Availability: InStock
Rating: 4.5 (38 reviews)

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HeadLOK® is a heavy-duty wood screw that is ideal for wood-to-wood connections including decks, fences, headers, installing kitchen cabinets, kitchen islands, stairs, rigid foam and more. Installation has never been easier with the addition of the TORX® ttap® drive system. TORX® ttap® is a premium drive system that combines the patented ttap® with button with the TORX® drive to provide superior bit engagement for a stable wobble-free installation making screw driving faster, easier and enabling single hand installations. The ttap® stability button provides unmatched wobble-free installations and eliminates fastener strip-out. The stability button keeps the fastener straight through installation. The HeadLOK fastener is compatible with standard T30 driver bits.

TORX ttap Drive System for superior bit engagement
Great for decks, fences, stairs, rigid foam, cabinets and more
Code-compliant, tested & supported by engineering data
Includes (50) 8 inch fasteners & 1 TORX ttap bit
#14 screw replaces 3/8 inch lag bolts
Compatible with TORX ttap T30 or TORX T30 bits
ProjectLife Coating for guaranteed corrosion resistance
Chamfer head increases strength
Heat treated to maximize durability

General
Finish	Galvanized/Coated	Use Location	Exterior
Manufacturer Color/Finish	Black	Head Type	Flat
Type	Structural wood screws	Thread Type	Coarse
Material	Steel	Point Type	Sharp
Package Quantity	50

Dimensions
Length Measurement	8-in	Screw Thickness	3/8-in

Features
Drive	Torx	Multi-Material	No
Materials Fastened	Wood to wood

Certifications
ACQ Approved	Yes	CA Residents: Prop 65 Warning(s)	No

Warranty
Warranty	Limited lifetime

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

Miscellaneous
UNSPSC	31161500

Check out the Best Selling Lag Screws on Lowes.com

Review

4.5 out of 5

38 Reviews

2 Star

92% Recommend this product

Ratings may include incentivized customer reviews.

38 Customer Reviews

Sort By

Structural screws

Would Recommend

Great engineering product

cdpinbMay 20, 2026
Verified Purchaser

Was this Review Helpful ?

Good quality

Would Recommend

Good quality

rrrrMay 16, 2026
From 3_SLASH_8-in x 8-in Black Galvanized_SLASH_Coated Flat -Head Exterior Structural wood screws 50 -Pack Verified Purchaser

Was this Review Helpful ?

Great Product

Would Recommend

Easy to screw in and they hold like crazy

PaPa CApril 17, 2026
From 3_SLASH_8-in x 8-in Black Galvanized_SLASH_Coated Flat -Head Exterior Structural wood screws 50 -Pack Verified Purchaser

Was this Review Helpful ?

Used these for 6x6s and rhey workef like a charm

Would Recommend

Good fastener

Mh63April 16, 2026
From 3_SLASH_8-in x 8-in Black Galvanized_SLASH_Coated Flat -Head Exterior Structural wood screws 50 -Pack Verified Purchaser

Was this Review Helpful ?

Did what it needed to

Would Recommend

Great item

CluelessApril 16, 2026
From 3_SLASH_8-in x 8-in Black Galvanized_SLASH_Coated Flat -Head Exterior Structural wood screws 50 -Pack Verified Purchaser

Was this Review Helpful ?

Solid hold for landscape timbers

Would Recommend

Holds my landscape timbers tightly together. They drive easily and hold well.

SkiptaylorMarch 17, 2026
Verified Purchaser

Was this Review Helpful ?

Quality fastener

Would Recommend

it completed the job for our roof. It came with the necessary bit to install the fastener .

sbporchMarch 10, 2026
Verified PurchaserIncentivized

Was this Review Helpful ?

Great doing business wit you.

Would Recommend

everything was good

AlanJanuary 27, 2026
From 3_SLASH_8-in x 8-in Black Galvanized_SLASH_Coated Flat -Head Exterior Structural wood screws 50 -Pack Verified Purchaser

Was this Review Helpful ?

3 Questions

Read All Q&A

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Can these be used to fasten trusses to top plate?

Do you sell the Spider bits seperate?

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COMPARE PRODUCTS

		Name	Current Item FastenMaster3/8-in x 8-in Black Galvanized/Coated Flat -Head Exterior Structural wood screws 50 -Pack
		Ratings	38
		Length Measurement	8-in
		Material	Steel
		Type	Structural wood screws
FastenMaster3/8-in x 6-in Black Galvanized/Coated Flat -Head Exterior Structural wood screws 50 -Pack	FastenMaster3/8-in x 10-in Black Galvanized/Coated Flat -Head Exterior Structural wood screws 50 -Pack	SPAX5/16-in x 8-in Black Coated Washer -Head Exterior Structural wood screws 50 -Pack	FastenMaster3/8-in x 8-in Black Galvanized/Coated Flat -Head Exterior Structural wood screws 50 -Pack	CAMO5/16-in x 8-in Black Polymer Flat -Head Exterior Structural wood screws 50 -Pack	FastenMaster3/8-in x 10-in Black Galvanized/Coated Flat -Head Exterior Structural wood screws 50 -Pack	CAMO5/16-in x 10-in Black Polymer Flat -Head Exterior Structural wood screws 50 -Pack	CAMO5/16-in x 6-3/4-in Black Polymer Flat -Head Exterior Structural wood screws 50 -Pack	CAMO5/16-in x 6-in Black Polymer Flat -Head Exterior Structural wood screws 50 -Pack
296	22	6	38		22
6-in	10-in	8-in	8-in	8-in	10-in	10-in	6-3/4-in	6-in
Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel	Steel
Structural wood screws	Structural wood screws	Structural wood screws	Structural wood screws	Structural wood screws	Structural wood screws	Structural wood screws	Structural wood screws	Structural wood screws