Heavy Duty Concrete Screw Bolt

For this Heavy Duty Concrete Screw Bolt, the main specs to look at are the diameter and length. You can get them in diameters from 6mm to 12mm (metric) or 1/4" to 1/2" (inch). The lengths you can get depend on the diameter, typically from about 30mm to 150mm for metric and 1-1/4" to 6" for inch sizes, which covers most light or medium-duty jobs.

They come in two main types. We have a regular one for daily jobs—like putting up a shelf or a light fixture on an indoor concrete wall. Then there’s a heavy-duty one for harder tasks. It’s made with thicker material to hold more weight, say for mounting heavy equipment. Both types have the same kind of threads that cut into concrete just fine.

Product quality control

We do a few basic checks while making these  Heavy Duty Concrete Screw Boltto weed out any faulty ones. First off, we inspect the raw metal to make sure there aren’t any cracks or weak spots that might snap when you drive it into concrete. Then we check the threads—they need to be even and sharp enough to cut into concrete smoothly without getting messed up.We also measure the diameter and length to make sure they match the standard sizes. Then we check the surface coating too. We just make sure it’s applied evenly, with no thin patches or missed spots that could cause rust later on.

We pick random samples from each batch to run these checks. Finally, we do a quick test by driving one into a concrete block, just to make sure it grips and holds properly like it’s supposed to. There's nothing overly complicated—just these key steps to make sure the Heavy Duty Concrete Screw Bolt works properly for everyday jobs or tougher industrial use.

Q&A Session

Q:Will it rust if used outdoors? How long does the surface treatment last?

A:It depends on the surface treatment. Zinc-plated bolts are fine for covered outdoor spots, but they might start to rust after a year or two if they get hit by heavy rain a lot. Hot-dip galvanized ones can last five to eight years outside, even in humid or slightly salty areas. If you need something that holds up outdoors long-term, just go with stainless steel ones. If you would like to have a look, I can prepare a corrosion resistance test report for the Bolt  for you. To extend life, clean the bolt surface regularly if it’s exposed to rain or dust.