KD Fasteners’ 300 series stainless steel heavy hex nuts are an excellent pairing to 300 series stainless steel heavy hex bolts in outdoor settings.

Heavy hex nuts are six-sided nuts with threads in the middle meant to mate with heavy hex bolts with similar threads. Using one of the 300 series stainless steels in our heavy hex nuts make them a far superior metal to standard stainless steel as they are less corrosive when exposed to the environment.

300 series stainless steel is 18 percent chromium and 8 percent nickel which is why it’s also known as 18-8 stainless steel.

300 series Stainless Steel characteristics:

Non-magnetic
Maintain strength at high temperatures
Low electrical and thermal conductivity
Anti-rust properties
High-temperature tolerance
Low maintenance properties
Resists corrosion

KD Fasteners, Inc. offers ready and custom made 300 series stainless steel in the following grades.

302 – tough and ductile, cold working increases hardness
302 HQ
303
304 – versatile, carbide precipitation minimized, high-temperature applications, resists acid corrosion
305
A2- the metric equivalent of the 300 series

KD Fasteners, Inc.’s line of 300 series stainless steel heavy hex nuts are incredibly versatile and can easily be used in a variety of industries

Automotive industries
Construction industries
Mining industries
Chemical industries
Cryogenic applications
Food industries
Dairy industries
Pharmaceutical industries
Cookware products
Appliance products
Sinks
Tabletops
Military (MilSpec compliant)
Aerospace industry
Oil and gas industries
Marine industries
Water treatment

300 series Stainless Steel hex nuts are available in standard (inch) and metric sizing and are made in the United States. Off-the-shelf sizes range from a ¼ inch to 3-inch diameter. Whether you need a standard or custom size, KD Fasteners has a solution for you. Contact us today by calling 1-800-736-5014 or filling out our contact form.