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The anchor is made from Carbon Steel, and is Zinc Plated. This anchor is designed for use in Concrete.
Environment
The anchor is designed for use in a Dry environment.
Head Style
The anchor is a Hex Washer Serrated head and is designed to allow the head to sit on top of the surface of the item being attached.
Hole Diameter/Bit Diameter
The anchor requires a 3/8" hole to be drilled in the base material (Concrete). The hole should be drilled with carbide tipped bit using a hammer drill.
Driver Required
A 9/16" nut driver is required for driving the anchor into the base material.
Diameter of Anchor
The diameter of the anchor is 3/8".
Length Anchor
The length of the anchor is 3"
Minimum Embedment
The minimum anchor embedment into the concrete is 1-1/2". Therefore, the anchor must be installed so that a minimum of 1-1/2" of the anchor is embedded into the concrete.
Maximum Fixture Thickness
The maximum fixture thickness or the maximum thickness of the material being fastened for a anchor is 1-1/2". This will ensure that the minimum embedment of 1-1/2" will be met.
Fixture Hole Diameter
The hole in the fixture or material being fastened must be larger than the designated diameter of the anchor. The 3/8" diameter anchor requires the hole in the fixture to be 7/16".
Spacing between Anchors
Each anchor must be spaced a minimum distance of 6" from each other when measured center to center.
Edge Distance
It is very important not to install the anchor any closer than 3" from an unsupported edge of the concrete.
Stavesacre
2025-08-29 11:53:39
Used 16 of these to anchor our 12x16 Yardestry gazebo to our stamped concrete patio. Didn't have an issue with any of them. Good quality screws when used as designed. As they are NOT rated for outside/wet/damp environments, I will be painting them the same color as the brackets they anchor. If you intend to use ourdoors and don't want to paint them, look into stainless steel instead.A few tips for successful installation:- You MUST drill deeper than the length of the anchor. This seems like common sense but if you're even drilling to the exact length, you will likely reach a hard stop a few millimeters before its tight. Put a piece of duck or painters tape on the bit to show where to stop.- Blow out the drill hole. This is an absolute must do or you won't be able to screw it in very far. All that dust will compact and make it impossible to advance very far. Can of compressed air or even better an air compressor with a blow tool worked great for me. A can wouldn't have been enough for 16 holes.- Use an impact wrench but *CAREFULLY*. This is great for 2 reasons, #1 being you don't get carpal tunnel syndrome after manually screwing over a dozen if these in by hand and more importantly #2 it allows you to get on top of it and put you body weight into it. This helps significantly with getting the threads started and grabbing almost instantly. But be warned that this isn't like using it on metal-to-metal threads, as depending on the concretes make/age you could very quickly strip the hole with too much TQ used too quickly. Slow the impact as you near flush and stop once you get to 1 or 2 impact cycles that slowly turn the screw.- Use the right size drill bit. Seems obvious but just make sure your drilling with the SAME SIZE masonry bit as the screw is. If its even 1 size smaller you won't be able to get it to grab/advance.- Hammer drill. You might be able to pull it off with a regular drill but the hammer drill makes quick work of this and it's what it's designed to do. Your bit will wear faster as it will take longer and warm up/wear down faster because so.If you follow these basic tip, you'll have no issues with these screws. Good product and I prefer them over wedge anchors as it spreads the tension of the achor throughout the whole length of the screw and not just at the end.
Joshua B.
2025-08-18 12:29:24
super strong connection - works really well and holds very secure.
Customer
2025-07-18 16:37:32
Never had any problem with these. Use your rotary hammer to drill a 3/8 diameter hole to a bit deeper than the bolt length, drive with 9/16 hex.
Customer
2025-06-15 15:00:50
Very good anchor for concrete
tcpip
2025-05-19 11:18:01
I was very surprised to receive a follow-up message from the seller to make sure that we were satisfied with the product. But since I get material way in advance, the project is due; my review is now months after I purchased it because for me to indicate they came fine and on time is not the review that you are looking for. I must say that this product is recommended for someone in the trade because you do need the proper equipment, and they also need some specific techniques that I will not repeat because a couple of people have already made a great list of things to consider. The one extra step I added was to "wet" the anchor threats with silicone to sort of "glue" it in place and perhaps minimize movement from ground expansion. I felt very supported by the seller by following up with me (which perhaps shows my effort in writing a review that I seldom do), and to reassure you that these are quality materials, just make sure that you do have the appropriate tools and follow proper procedure.
INTREPID
2025-04-28 11:49:55
Important Tips and why some people give negative reviews or break bolts:1. Make sure you're using the right size masonry bit.2. Holes for concrete screws should be at least 1/4-in. deeper than the screw will penetrate to allow a little extra space for dust accumulation.3. You MUST clean out the hole - I recommend a can of air or a shop vac.4. If you’re having trouble driving the screw all the way, first make sure the hole is deep enough. If it is and you’re still having trouble, there’s probably too much grit in the hole. Remove the screw and clean out the hole by running the bit in and out a few times. Then blow or vacuum the hole clean again. If it’s still stubborn, back it out and re-drive it a few times.5. If you still have trouble, install another screw a few inches away.6. Sometimes you’ll have the opposite problem — the screw will spin without gripping. If this happens, the material you’re trying to fasten to is probably too soft or crumbly. Try a thicker and/or longer screw.7. If all else fails, you may need a concrete anchor that expands as you tighten the fastener - called a Wedge Anchor.Note: After loosely threading the bolt in, I like to remove the bolt, blow out the hole and then apply a thin layer of construction adhesive (such as Loctite Power Grab) to the bolt threads. Don't over-tighten.
paul c mingo
2025-04-06 11:18:15
I used 4 per column to anchor a Costco Yardistry Gazebo kit to the concrete footing pads. With just one per column, it was going nowhere. I used a shop vac to clean the dust out of the holes. Make sure you have drilled deep enough or you will definitely hit a hard stop. Otherwise they screw in fairly easily.
Michael
2025-04-02 11:19:22
exactly what I needed
BlueRoo2
2025-03-11 16:15:40
I found that the 5/16 masonry bit that matches these screws does tend to deflect sightly making the screw difficult or even impossible to drive in. Over a shorter hole there is far less deflection and the screws hold very well. The 2 ½ inch screw however frequently seizes part way in.
Enrique
2025-03-08 10:00:11
Es un producto excelente, cumplió al 100 mis expectativas
Jordan Regan
2025-02-13 18:46:52
Used the whole box the first day! Strong and easy to use. Will be buying more
Joe
2025-01-06 18:26:27
I was prepared to be disappointed compared to the usual top tier brand I get. Pleasantly surprised. Awesome fastener.
bruce wagner
2024-12-29 17:32:05
used to tanker my 12ft x12ft door opening they seem to hold very well in concrete hope they work as good in brick and block
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