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Stainless Steel Hex Lag Screw - 3/8"

Stainless Steel Hex Lag Screw - 3/8"

Item # FA74521
Our Price: $5.59
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Shipping Weight: 0.04 lbs
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  • Reviews (75)
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  • Videos (1)
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Fastenal Accessories and Parts - FA74521

  • Trailer Fenders
  • Screws
  • Fastenal

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

74521 Fastenal 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 Transcript for Review of Fastenal Trailer Fender Parts - Stainless Steel Hex Lag Screw - FA74521

Ellen: Hey everybody. I'm Ellen here at and we're going to be taking a quick look at these stainless steel hex lag screw.This helps to make sure that you can attach any kind of material that might be under a heavy load. That's typically where you're going to want a lag screw. It is a very sturdy, well-built screw. Has a three three-eighths inch diameter, so you'll want to make sure that you drill out a pilot hole that matches that. The length is 1-1/4 inch.So 1-1/4 inch there and the wrench size that will work with this up at the top is 9/16 of an inch.That's pretty much all there is to it for our look at the stainless steel hex lag screw.If you need any other hardware or other accessories, we have a lot of options available here at

So check them out.Thanks for watching.

Customer Satisfaction Score:

Customer Reviews

Stainless Steel Hex Lag Screw - 3/8" - FA74521

Average Customer Rating:  4.8 out of 5 stars   (75 Customer Reviews)


Perfect stainless steel lag screw for bunk board installations


No problem


Worked great with the rubber numbers


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.


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.


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.


Great service great product. Fast deli very.


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.


Fit and work great. Quality!


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.


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.


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 .


Excellent product, great price and fast shipping


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.


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.


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


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


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.




Great for bolting brackets to bunks


Easy to order from website, quick delivery after order, quality products received! Great experience!


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


Thank you for getting the product to me in a very timely manner. It was pakaged the best I have ever seen. I was very impressed by the way it was shipped. Thank you again, it's always great to do business with you. Bob j


Exactly what I needed.
Items fitted
Order was tracked with precision.


Great service and delivery parts worked great.

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Info for this part was:

Employee Zack K
Video by:
Zack K
Employee Kathleen M
Installed by:
Kathleen M
Employee Randy B
Installed by:
Randy B

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