Model # FMHLGM412-50

Internet #202268258

Store SKU #519367

Store SO SKU #336802

FastenMaster HeadLok 4-1/2 in. Heavy Duty Flathead Fastener (50-Box)
0608309410584

FastenMaster

HeadLok 4-1/2 in. Heavy Duty Flathead Fastener (50-Box)

  • ACQ approved and code-compliant design
  • Included spider drive
  • Self-tapping design eliminates the need for drilling
$3567 /each

Choose Your Options

Package Quantity
50
Product Weight (lb.)
2.35
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Product Overview

  • ACQ approved and code-compliant design
  • Included spider drive
  • Self-tapping design eliminates the need for drilling
Save time, money and labor costs. HeadLok eliminates the need to predrill and hand-ratchet in 3/8 in. galvanized lag screws in wood-to-wood projects. HeadLoks aggressive threading and sharp gimlet point allows it to zip right into wood or OSB without pre-drilling. Plus, the wafer head eliminates the need for washers and offers increased pull through strength. Perfect for deck framing, stair stringers, fencing, cabinets, and more! Sizes are perfect for virtually any dimensional wood-to-wood project.
  • Nationally code compliant; stronger design shear values than 3/8 in. lag screws
  • No pre-drilling; zip right in
  • Patented spider drive virtually eliminates cam-out
  • Guaranteed corrosion resistance for the life of the project; ACQ approved
  • Free spider drive bit in every package
  • American made

Product Overview

  • ACQ approved and code-compliant design
  • Included spider drive
  • Self-tapping design eliminates the need for drilling
Model #: FMHLGM412-50
Sku #: 519367
Internet #: 202268258

Save time, money and labor costs. HeadLok eliminates the need to predrill and hand-ratchet in 3/8 in. galvanized lag screws in wood-to-wood projects. HeadLoks aggressive threading and sharp gimlet point allows it to zip right into wood or OSB without pre-drilling. Plus, the wafer head eliminates the need for washers and offers increased pull through strength. Perfect for deck framing, stair stringers, fencing, cabinets, and more! Sizes are perfect for virtually any dimensional wood-to-wood project.

  • Nationally code compliant; stronger design shear values than 3/8 in. lag screws
  • No pre-drilling; zip right in
  • Patented spider drive virtually eliminates cam-out
  • Guaranteed corrosion resistance for the life of the project; ACQ approved
  • Free spider drive bit in every package
  • American made

Info & Guides

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Price
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Name TimberLOK 2-1/2 in. Hex-Head Heavy Duty Wood Screw - 50 Piece Pack HeadLok 4-1/2 in. Heavy Duty Flathead Fastener (50-Box) 10 in. TimberLok Coarse Steel Hex-Head Heavy-Duty Wood Screws (50-Pack) #8 x 2-1/2 in. Black Philips Square Drive Flat-Head Coarse Thread with Nibs Self-Tapping (1000 per Box)
Brand FastenMaster FastenMaster FastenMaster
Ratings (1) (7) (9) (0)
Drive Style External Hex Star External Hex Combination
Fastener/Connector Material Steel Steel Steel Steel
Size #12 5/8 in #0 #8
Screw Length 2-1/2 in 4-1/2 in 10 in 2-1/2 in
Fastener Thread Type Coarse Coarse Coarse Coarse
Head Style Flange Hex Flat Hex Flat
View Product View Product View Product View Product

Specifications

Dimensions

Assembled Depth (in.)
.189 in
Assembled Height (in.)
4.5 in
Assembled Width (in.)
.189 in
Screw Length
4-1/2 in

Details

ACQ Rated Fastener
Yes
Coated
Y
Drive Style
Star
Driver bit included
Yes
Fastener Callout Size
4 1/2"
Fastener Plating
Other
Fastener Thread Type
Coarse
Fastener Type
Wood Screw
Fastener/Connector Material
Steel
Finish
Black
Finish Family
Black
Head Style
Flat
Indoor/Outdoor
Indoor/Outdoor
Measurement Standard
SAE
Package Quantity
50
Primary Use
Wood-to-wood construction i.e. decking, cabinets, stair stringers, SIP pannels, and more!
Product Weight (lb.)
2.35lb
Returnable
90-Day
Self drilling
Yes
Self tapping
Yes
Size
5/8 in
Tamper Resistant
No

Warranty / Certifications

Manufacturer Warranty
FastenMaster fully guarantees HeadLok against rusting or streaking for the lifetime of the project. Please see the following link for further details at: http://www.fastenmaster.com/Files/TechnicalCodeFiles/20/DocumentFile/FMGYHLGM20090901.pdf

Specifications

Dimensions

Assembled Depth (in.)
.189 in
Assembled Height (in.)
4.5 in
Assembled Width (in.)
.189 in
Screw Length
4-1/2 in

Details

ACQ Rated Fastener
Yes
Coated
Y
Drive Style
Star
Driver bit included
Yes
Fastener Callout Size
4 1/2"
Fastener Plating
Other
Fastener Thread Type
Coarse
Fastener Type
Wood Screw
Fastener/Connector Material
Steel
Finish
Black
Finish Family
Black
Head Style
Flat
Indoor/Outdoor
Indoor/Outdoor
Measurement Standard
SAE
Package Quantity
50
Primary Use
Wood-to-wood construction i.e. decking, cabinets, stair stringers, SIP pannels, and more!
Product Weight (lb.)
2.35lb
Returnable
90-Day
Self drilling
Yes
Self tapping
Yes
Size
5/8 in
Tamper Resistant
No

Warranty / Certifications

Manufacturer Warranty
FastenMaster fully guarantees HeadLok against rusting or streaking for the lifetime of the project. Please see the following link for further details at: http://www.fastenmaster.com/Files/TechnicalCodeFiles/20/DocumentFile/FMGYHLGM20090901.pdf

Questions & Answers

Im building a dock on a lake using treated pine. Im using 2x 6,8, and 2x 12....Post are 4x4, W...

Im building a dock on a lake using treated pine. Im using 2x 6,8, and 2x 12....Post are 4x4, What size screws should i use or should I use nails?
Asked by: roger
You may also want to consider the 6-1/4" long "ThruLok" fastener, which installs quickly & easily like the TimberLok/HeadLok/FlatLok screws, yet it has a large nut on one end so it's like hybrid of a screw and a thru-bolt. The nut is rather cumbersome though, so just make sure it's on the inside face, hidden from view & from catching on anything, concealed below the dock decking.
Answered by: Greg
Date published: 2017-08-10

What is shear strength

Asked by: Mike
EfRed has an excellent description of shear strength, however the numbers given for the steel are much higher than wood, so the controlling factor here is the wood, which is much softer than the steel. The shear strength of the fastener in wood will be much lower than the 3,300#. Depending on the species of wood you're using this with, the allowable shear value for a single screw ranges from 189# to 299#. Load duration factors can be applied to increase or reduce this value (increase in most cases), and there are several edge distance and spacing requirements that need to be met to achieve the full values. There's an extensive library of technical documents on their website: http://www.fastenmaster.com/
Answered by: Greg
Date published: 2017-08-10

Thread diameter?

Asked by: Tina
.26 inch outer major diameter, .172 inch minor from specification sheet
Answered by: RH512
Date published: 2017-09-19
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Customer Reviews

HeadLok 4-1/2 in. Heavy Duty Flathead Fastener (50-Box) is rated 4.1 out of 5 by 7.
Rated 5 out of 5 by from These fasteners worked great for my project. They are very strong and have held up well to the e... These fasteners worked great for my project. They are very strong and have held up well to the elements so far. The spider drive bit is included but check the box before you leave the store as they weren't in several of the boxes I checked. I had no issues with the bits and no issue driving the fasteners with my 18v Ridgid Drill. I used about 100 of these on a single 4.0ah battery. Would use these again on future projects as they are both strong and look good in the finished product.
Date published: 2017-10-04
Rated 5 out of 5 by from Homemade Camper Project These screws are advertised as being stronger than regular lag bolts. I purchased these in two different lengths for use in my project. I already had a partial box of these in 6" length from a previous project. I find that pre drilling a pilot hole before installing is the best way to go in the Douglas Fir I am using. I especially like the fact that an installation tool is provided with each box of screws. The screws have an aggressive thread which provides a great grip into lumber. Holding power is what I wanted and I believe these screws provide just that.
Date published: 2016-02-23
Rated 5 out of 5 by from This product is versatile, strong and virtually invisible The HeadLok line of fasteners from Fastenmaster provides utility and ease of use. We use them all over for decks, railings and shade structures.
Date published: 2013-08-21
Rated 1 out of 5 by from Terrible Customer Service Bought a box of the 2 7/8" screws for a home project The first five I used were so dull that even with a fresh battery in my driver, I had to predrill every hole. Then I almost tore my hand to shreds with a damaged screw head. Complaints onlon line went unanswered. BUYER BEWARE!!
Date published: 2017-04-17
Rated 5 out of 5 by from Super screws home depot had these screws cheaper than anyone else online. these scews are excellent for all application that supper hold is needed and isnt seen or cosmetic isnt a issue they have large heads they are stronger than most lag bolts easily installed with my 14v cordless
Date published: 2011-05-02
Rated 5 out of 5 by from Great product. Warrantied for life of project. I will periodically inspect corrosion protection. Saves time. Saves money in bulk. No need for rafter hangers. Corrosion resistant for life. Great product.
Date published: 2015-08-25
Rated 3 out of 5 by from great screw, lousy bits I love the screws. They drive easily into PT timbers with impact drivers. The bits however are way too soft and self-destruct very easily. I went through 13 spider bits for only 150 screws. So if you buy a bucket load of screws, be prepared to buy all of the spider bits available in the store. I used two impact drivers for this particular job. The first was a Milwaukee 2563 cordless impact driver with 3 torque setting options. To drive the 4.5 inch screw, the most powerful setting was needed. It would come close to flush driving the screws in PT timbers and boards. The only problem was the battery would die after only a dozen screws. So I don't recommend using that tool with this size screw. The second impact driver was a Porter Cable 120v driver. It had no problem power wise and would easily drive the screws. The only concern is it does not have any torque setting options. So you have to be careful when driving to stop before the head gets close to being set how you like or need it to be. I'm looking for a 120v impact driver with torque settings. That or another cordless impact driver with torque settings and more power or larger battery capacity. Again, love the screws, hate the spider bits.
Date published: 2013-06-23
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