(4 Sets) 3/8-16x4 Stainless Steel Hex Head Screws Bolts, Nuts, Flat & Lock Washers, 18-8 (304) S/S, Fully Threaded by Bolt Fullerkreg

Very impressed with this hardware. Used these to fasten together some end-of-driveway curb ramps also bought on Amazon. These parts seemed well made and were all in spec.

Good quality and was perfectly suited for the task.

Very high quality with a nut, washer and lock washer. I bolted down a vise on my workbench and it's nice and solid. Highly recommend if you're bolting equipment down such as a drill press, table saw, or even using as a bolt for clamps. Very sturdy and high quality

Worked as they should.

Appear to be good quality Ad is misleading. Shows six bolts but you only receive 4. So you need to read ad very carefully

Great bolt even though the price is on the higher size. But you do receive what you paid for.

Served the purpose.

The box stores don't stock all sizes of stainless steel hardware, and it takes forever to arrive if I have to order it (10+ days). These arrived next day and are exactly what I needed.

These bolts are actually manufactured to a real standard, that being ASTM F593 and are in the CW1 (cold worked) condition. The bolt heads are marked F593C. Cold working increases both tensile and yield strengths. Specified yield is 65 ksi and tensile is 100 to 150 ksi. The increased strength comes with a corresponding reduction of ductility but it is still good for most uses at a minimum of 20% elongation. Threads appear to be cold rolled which reduces the chance of galling. Nuts are marked F594C which is the appropriate grade of nut for the bolts with a 100 ksi proof load. Note that due to the cold working these bolts WILL BE magnetic to a certain degree. You cannot use a magnet to determine if oy have austenitic stainless (like 304) unless it is in a weak, annealed, state. If they were not magnetic at all I would be disappointed. I purchased 3/8" x 1.5" and 3/8" x 4".

Would buy again

If you need a heavy-duty screw and nut combination this is a great product.

Pricey, but they arrived fast and they got the job done. No hardware store around me had these exact measurements so I had to get em off Amazon.

these did more than we expected. ease to tighten up