Stainless Steel Hex Machine Screw Nuts Are Used For Fastening To A Bolt When Mechanically Joining Materials Together. This Type Refers To Nuts Used With Smaller Machine Screw Sizes Under 1/4". Machine Screw Nuts Are Designed To Be Used With Machine Screws Of A Similar Finish And Size. Parts Feature A Stainless Steel Finish For Best-In-Class Corrosion Resistance. *