Fractional Hex Flange Nuts
Product Announcement from Stanley Engineered Fastening - Spiralock
Standard Spiralock nuts are SAE Grade 8 equivalent, and designed to mate with standard 2A and 3A class of fit bolts. Spiralock nuts dimensionally conform to IFI standards. Spiralock standard plating is clear zinc chromate. Other nut styles, platings and materials are available upon request.