Stainless Steel Hex Lag Screw - 3/8"

Part Number: FA74521

In Stock

$6.51

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Comprehensive Review: Stainless Steel Hex Lag Screw

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1-800-940-8924 to order Flint Hill Goods accessories and parts part number FA74521 or order online at etrailer.com. Free expert support on all Flint Hill Goods products. Great prices and Fastest Shipping for Stainless Steel Hex Lag Screw - 3/8". Accessories and Parts reviews from real customers.

Flint Hill Goods Accessories and Parts - FA74521

Diameter: 3/8"
Length: 1-1/4"
Wrench size: 9/16"

74521 Flint Hill Goods Stainless Steel Hex Lag Screw

Video of Stainless Steel Hex Lag Screw - 3/8"

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Demo Flint Hill Goods Stainless Steel Hex Head Lag Screw FA74521

Comprehensive Review: Stainless Steel Hex Lag Screw

Video Transcript for Comprehensive Review: Stainless Steel Hex Lag Screw

Hello everybody, this is Jeff at etrailer.com. Today, we take a look at this 3/8 inch by seven by 1 1/4 inch long stainless steel hex head lag screw. And this is for a quantity of one screw. If you notice, it is a hex head design, and it is a lag screw. This is a stainless steel construction, so it's great for outdoor applications. They're normally used in wood construction.

The size, again, is 3/8 inch by seven by 1 1/4 inch long threads. The head size on this is 9/16 of an inch, and the grade on this is a 18-8 grade. But that should do it for the review on this 3/8 inch by seven by 1 1/4 inch long stainless steel hex head lag screw.

Customer Satisfaction Score:

95% were satisfied with this product

5% of customers were not satisfied

Product did not meet expectations
Wrong item was ordered
Did not arrive in time

5% of customers were not satisfied

Product did not meet expectations
Wrong item was ordered
Did not arrive in time

4.7

111 reviews

5 Stars		(93)
4 Stars		(11)
3 Stars		(3)
2 Stars		(0)
1 Star		(4)

by: John 05/18/2026

Quality product.

by: Gerald T. 10/26/2016 One Year Later

I used the ss hex lag screws and CE Smith swivel brackets to replace the bunk boards on my bass boat trailer. Both items have performed well with no issues. I expect to get years of service from them. I have purchased many products from Etrailer and have received excellent customer service and timely delivery.

by: Howard 07/05/2017

Everything came in as advertised. Purchased CE Smith bolsters, u-brackets, lag screws and carpet. Added two bunk boards to my Lowe trailer (Karavan). Only had two boards and I wanted extra to support the weight of the boat. Everything assembled easily. My boat loads easier and trailers better. Plus I have the piece of mind of having 4 boards vs 2.

by: Bob C 08/14/2017

Exactly the parts I was looking for, and for a price that couldn't be matched. The cost with shippping was less than just the parts at other places. I ordered 3 rubber bumpers for the tailgate of my toy hauler, along with the necessary mounting hardware. Shipping confirmation the same day.
I kept checking the shipping tracking number and expected the package in about 8 days. It actually arrived 2 days early. (economy shipping chosen)
Great service from etrailer.

by: Jerry T. 03/11/2016 One Year Later

I used these fasteners to attach the swivel brackets to my bunk boards on my bass boat. Excellent product and competitive price. These could not be found locally and what I did find locally was not acceptable.

by: Will 05/30/2017 One Year Later

I ordered two rubber pads with lag screws and washers for a trailer ramp. The order arrived within a very reasonable time frame. I was pleased with the order, the service, and the merchandise. Definitely will do business again.

by: Jessie 05/13/2015

Local sport goods does not carry but up to two inch brackets this company had everything I needed and followed up with E-mail to ensure my brackets and screws that order were receive in proper time frame and that I was happy with product. I found this type of customer service very rare in today's time. God bless this business for being different.

by: John 05/31/2018

much better holding power than the 1/2 lag screws the 3/8 lag screws replaced . with stainless steel screws and washers , no worries about replacing them .

by: Mike M. 04/21/2015

I used the SS lag screws to secure my boat trailer bunk boards to the trailer frame. The price was great and shipping was fast.

by: Richard 04/21/2022

Perfect stainless steel lag screw for bunk board installations

by: Clay 12/20/2017

eTrailer had the parts i needed at the best price I could find after researching numerous places. The order was practically shipped immediately and arrived within a few days. They even followed up byu email to confirm delivery and to make sure I received exactly what I wanted/needed.

by: Brenda 04/03/2017 One Year Later

I have been please with all products I have purchased through etrailer

by: David 07/15/2025

Came as described. Fast service.

by: David 07/01/2020 One Year Later

Great product and easy installation! Would buy from them again!

by: TOM D. 06/24/2015

EASY INSTALL PREFECT FIT QUICK DELIVERY GREAT PRICE THANKS ETRAILER

by: Mike W 06/09/2016

Got the stuff yesterday, fast shipping and product is exactly what I ordered, Good Job! Will definitely order from you again.

by: Jason 02/06/2022

Excellent product, great price and fast shipping

by: John D 05/05/2015

No problems, fast shipping,excellent service.
ND.

by: Danny R 09/01/2019 One Year Later

A exact replacement and good product.

by: Ken H 04/15/2017

Everything in the order came exactly as represented, received in a couple of days, and the best pricing I found. On a 1 to 10 scale, I give etrailer 12.

by: Warren 05/02/2020

Great selection of parts. Search engine worked well to help me find what I needed on line. Arrive quickly. Friendly customer service.

by: Ron 06/15/2019

Easy ordering and fast shipping. Will order from again.

by: Ethan 10/10/2016

Great for bolting brackets to bunks

by: Tom 05/20/2020

Bolts are of good quality and are what I was looking for to install my trailer boards.

by: Mike M 07/30/2013

Fast Shipping and Excellent Product

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What Size Lag Bolts do I Need to Swap Out Bunk Boards on 20 Foot Bass Boat?
Hello Randy, Great question. For replacing bunk boards on a 20 ft bass boat trailer (like # CE27845), you’ll want 3/8 inch diameter lag bolts that are 1-1/2 to 2 inches long, depending on the thickness of your bunk brackets. Go with hot-dipped galvanized or stainless steel, use flat washers, and drill a small pilot hole (1/4" bit will do the trick) so the wood doesn’t split. Lightly countersink the heads so they don’t rub through the carpet, snug them down without overtightening, and you’ll...
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V Mounting Brackets to Convert Conventional Trailer into Pontoon Boat Trailer
The V mounting brackets that you could use to convert your conventional trailer to a pontoon boat trailer are the CE Smith V-Wing Bolster Bracket, # CE26244G. When it comes to mounting hardware for these brackets, I recommend using a screw and washer like our 3/8 Inch Stainless Steel Hex Lag Screw, # FA74521, and Stainless Steel Washer, # FA0152661. I have attached a link to our U-bolts for boat trailers. Since the mounting slot on the V bracket would typically run parallel with the...
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How Long of Lag Bolts Should I Use w/ the CE Smith Bolster and Swivel Bracket Assemblies?
Hey Jeff. The CE Smith Bolster and Swivel Bracket Assemblies item # CE10000G-4 are going to need a 3-1/16" wide on the inside u-bolt that has threads that go down to at least 1-1/2" from the inside of the bolt. The 3-13/16" Long x 3-1/16" Wide CE Smith U-Bolts item # CE15283GA-4, you were looking at aren't going to work with a 1-1/2" wide frame member. The threads don't go down far enough. You'll need to source those u-bolts elsewhere as we do not have any that will work. The 1-1/4" long...
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How Many Screws Are Included With The Stainless Steel Hex Lag Screw # FA74521?
The Stainless Steel Hex Lag Screw # FA74521 contains one 3/8" diameter, 1-1/4" long lag screw.
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Recommended 5' Bunk Boards and Mounting Hardware For Boat Trailer
We have just what you need. For the two 5' bunk boards I recommend the CE Smith Carpeted Bunk Boards for Boat Trailers - 5' Long - 1 Pair # CE27820, but the longest board we offer is 7' so for the two 109" boards you will need to get them from your local hardware store and use the CE Smith Deluxe Marine-Grade Carpeting for Bunk Boards - Black - 18' Long x 18" Wide # CE11349 to add the carpet to the boards. To secure the bunk boards to the bunk brackets Stainless Steel Hex Lag Screw -...
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What Size Bolt to Use with Rubber Bumper for Enclosed Trailer Ramp Door # 37210715
The hole diameter of the Rubber Bumper for Enclosed Trailer Ramp Door # 37210715 is 3/8 inch so you'd want to pick a screw or bolt with that diameter to fit the best. We have a 3/8 inch diameter lag bolt with part # FA74521 which might work for your application.
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How To Attach Swivel Brackets To Bunk Boards?
Hi Christopher! I can definitely help you with getting the Tie Down Swivel Top Angle Bracket for Boat Bunk Boards - 3-1/2" Long # TD44FR attached to the CE Smith Carpeted Bunk Boards for Boat Trailers - 5' Long - 1 Pair # CE27820. I recommend using something like the Stainless Steel Hex Lag Screw - 3/8" # FA74521. This is stainless steel, so it will resist corrosion extremely well (which is important with a boat trailer). However, it is expensive for what it is. If I were installing something...
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How Many V-Wing Brackets Are Needed To Support A 28-ft Long Pontoon Boat
I contacted the manufacturer and one V-Wing Bolster Bracket, Item # CE26244G, should be placed at each frame cross member. Mounting hardware for these brackets is not included so I recommend using a screw and washer like our 3/8 Inch Stainless Steel Hex Lag Screw, Item # FA74521, and Stainless Steel Washer, Item # FA0152661. I have attached a video for you to check out.
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Installed by:

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Installed by:

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