Metallics SBH325 Bolts 3/8-16 X 6 Hxbt SS (Box 50)

The SBH325 is 18-8 stainless steel, an austenitic alloy used where general atmospheric corrosion resistance is needed, including chemical and food-processing equipment. That covers normal outdoor and washdown exposure. Aggressive chemical environments can call for a higher alloy such as 316 or added precautions, so match the fastener to the actual exposure rather than assuming 18-8 covers everything.

No. The SBH325 hex bolt is not Buy American compliant and is not ARRA compliant, and country of origin is listed as multiple. On a federally funded project with domestic sourcing language in the spec, this part will not satisfy it and you need a domestically produced fastener instead.

Minimum tensile strength runs 100,000 to 150,000 psi with a 65,000 psi minimum yield, and hardness is Rockwell B95 to C32. That is typical 18-8 stainless territory, well below a plated SAE Grade 5 or Grade 8 steel bolt, so if a drawing calls out a graded carbon steel fastener for a structural or high-torque connection, do not substitute this one on strength alone.

They ship as a box of 50 pieces, and 50 each is the order minimum, so this is a full-box buy rather than a loose count. Metallics lists other sizes and quantities on request.

Yes, that is a stated application for Metallics 18-8 stainless cap screws, along with chemical processing equipment, because the austenitic alloy resists general atmospheric corrosion. For sanitary installs it also avoids the flaking and rust bleed you get from plated carbon steel. Where the process chemistry is harsh, step up to 316 stainless.

Austenitic stainless like the 18-8 used in these Metallics hex bolts is prone to thread galling when run down fast and dry against a stainless nut or tapped stainless hole. Run them in slowly, use an anti-seize or lubricant on the threads, and torque to a stainless value rather than a carbon steel one, since yield here is 65,000 psi minimum and the fastener will stretch before a graded steel bolt would.