18-8 / 304 Grade Stainless Steel Machine Screw Nuts.

• A Machine Screw Nut is Most Commonly Used with Smaller Machine Screws Sized under 1/4".
• Used With Flat Head, Pan Head, Oval Head, Round Head, Truss Head, and Trim Head Machine Screws.
• Machine Nuts are also Popular with Small Sized Socket Head Cap Screws such as Flat, Button and Cap Head Screw Bolts. 
• Made of 18-8 / 304 Grade Stainless Steel, These are the Most Popular Variety of Machine Finish Nuts for Many Production Applications.
• Right Hand Thread, UNC