#4-40 Prime-Line 9073966 Machine Screw Hex Nuts Grade 18-8 Stainless Steel 100-Pack
Prime-Line 9073966 Machine Screw Hex Nuts, #4-40, Grade 18-8 Stainless Steel, 100-Pack - -. Size: #4-40 . Very common and versatile nut . Same in design as a standard hex nut, but smaller to accommodate machine screw sizes . Screws onto a machine screw of the same thread size . Often used with a washer with same diameter opening .