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Prime-Line 9056028 Hex Lag Screws, 3/8 in. X 1 in., A307 Grade A Zinc Plated Steel, 25-Pack

Free shipping on orders over CA $49.99

CA $13.53

CA $ 6 .99 CA $6.99

In Stock

1.Size:25 Pack


About this item

  • Size: 3/8 inch X 1 inch
  • Heavy duty wood screw with 6 sided hex bolt head
  • Features deep wood screw threads and does not accept a nut
  • Used in applications where standard wood screws cannot support the load (deck building, etc.)
  • Requires pilot hole to be drilled and installs using wrench or socket tool


Lag screw bolts are used in place of standard wood screws whenever the mounting surface must bear a heavy load. The hex head allows for lag screws to be tightened with more torque than can be used on phillips head screws, though a pilot hole is still required prior to installation. Note that lag screws do not accept nuts as they are technically thick heavy duty wood screws with threads designed to cut into wood. They are ideal for use on decks since installation can be accomplished without having access to both ends of the fastener, as opposed to standard hex bolts that require a nut on the opposite end.


Warrior Poet
Reviewed in the United States on December 31, 2024
Would Buy Again.
Chris James
Reviewed in the United States on May 6, 2020
I was reluctant to purchase hardware online as it was not much cheaper than a local store. When received these lag screws where not cut properly. I was looking for a heavy duty 3/8" screw for hanging some heavy duty wooden shelves. When received these actually had no spiral threads on them. You can see they attempted to be cut but the thread depth was probably 1/32". I would actually thread into a cheap soft pine 2"x4" stud.
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