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FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count,Black

FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count,Black

Q: We need 10” do you sell those

Amazon: I'm supposed to know your products?

Q: What is the sheer force and bending psi specs for these?

Per their spec sheet, the bending yield is 187,300 PSI and the allowable faster strength 1215 lbf Tensile and 965 lbf Shear

Q: why do i have to buy such a large quantity ?? why can't i get the 8 inch flathead in a 50 count >???

I always have big projects going. I am going to use a lot of them.

Q: I have to put three 2x6 pressure treated together for a main beam in a crawl space under a house, will these fastners work or do you sugest another?

You will only need 3" deck screws or drywall screws to put the beam together. I would not use the head lock screw. Probably will be 3 2x6 put together. Stager your joints on the beam if your 2x6's are not long enough to span from baring to baring.

Product ID: 4691599

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Details

Material
Carbon Steel
Head Style
Flat
Item dimensions L x W x H
9.5 x 7.5 x 10
Exterior Finish
Epoxy
Thread Size
4-1/2"

⚙️4-1/2" length for deep, secure fastening

🛠️No predrilling needed – zips right in

🛡️Corrosion-resistant epoxy finish, ACQ approved

Frequently Bought Together

FastenMaster FMHLGM412-250 HeadLOK Heavy-Duty Flathead Fastener, 4-1/2 Inches, 250-Count,Black

FastenMaster OMG-FMHLGM278-500, 2-7/8"

EAB Tool 96000 Spider Driver Bits, 3-Pack

Description

🛠️ Fasten smarter, not harder — the ultimate heavy-duty screw for pros who demand more!

BUILT TO LAST - Epoxy-coated carbon steel ensures corrosion resistance for the life of your project
AMERICAN MADE QUALITY - Crafted in the USA with precision and durability you can trust
VERSATILE APPLICATION - Ideal for deck framing, stair stringers, fencing, and cabinetry—perfect for any wood-to-wood task
CODE COMPLIANT STRENGTH - Outperforms 3/8" lag screws with superior shear values for heavy-duty projects
EFFORTLESS INSTALLATION - Patented Spider Drive virtually eliminates cam-out, saving time and frustration

The FastenMaster FMHLGM412-250 HeadLOK is a 4-1/2 inch, black epoxy-coated flathead fastener designed for heavy-duty wood-to-wood projects. It features a patented Spider Drive to prevent cam-out, aggressive threading for no-predrill installation, and superior shear strength exceeding 3/8 inch lag screws. ACQ approved and corrosion-resistant, this 250-count pack delivers professional-grade durability and efficiency, making it a must-have for deck framing, fencing, and cabinetry.

Specifications

Material	Carbon Steel
Head Style	Flat
Exterior Finish	Epoxy
Thread Size	4-1/2"
Point Style	Self-Drill Point
Metal Type	Alloy Steel
Brand	FASTENMASTER
Color	Black
Head Type	Flat
Item Weight	10 Pounds
Thread Type	Fine
Thread Coverage	Partially Threaded
Fastener Type	Screw
Set Screw Thread Type	Fine
Thread Style	Right Hand
Thread Class	Fine
Fastener Size	4 Inch - 6 1/2 Inch
Size	4 Inch - 1/2 Inch
Item Diameter	0.25 Inches
Compatible groove diameter	0.5 Inches
Number of Pieces	250
UPC	608309410355 767654837733
Global Trade Identification Number	00608309410355
Manufacturer	FastenMaster
Part Number	OMG - 5667704
Item Weight	10 pounds
Item model number	FMHLGM412-250
Is Discontinued By Manufacturer	No
Finish	black
Item Package Quantity	1
Cutting Diameter	0.25 Inches
Measurement System	Imperial
Usage	wood
Included Components	OMG - 5667704
Batteries Included?	No
Batteries Required?	No
Warranty Description	HeadLOK is fully guaranteed for the life of the project against rusting or corrosion. Fasteners are not intended for use within 1,000 feet of saltwater applications.

Have a Question? See What Others Asked

We need 10” do you sell those

What is the sheer force and bending psi specs for these?

why do i have to buy such a large quantity ?? why can't i get the 8 inch flathead in a 50 count >???

I have to put three 2x6 pressure treated together for a main beam in a crawl space under a house, will these fastners work or do you sugest another?

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