Bulk 5/8"-18 Hex Flange Bolts, Grade 8 Black Phosphate / Oil Size_5/16"-18 Drive: 3/16″ Hex (Allen) drive

Drive: 3/16″ Hex (Allen) drive for reliable torque application and secure engagement

Flat Point Advantage

Secure your assemblies with our high-performance DIN 127B Thru-Hardened Split Lock Washers

Available Options

Bulk 5/8"-18 Hex Flange Bolts, Grade 8 Black Phosphate / Oil Size_5/16"-18 Drive: 3/16″ Hex (Allen) driveUS Inch Hex Flange Bolts, Grade 8 5 8 18 High Strength Hex Flange Screws ASTM A307 Black Phosphate & Oil Finish Monster Bolts Our Fine Thread Hex Flange Screws, Grade 8 5 8 18 are engineered for applications requiring superior strength and durability. Crafted from premium Grade 8 steel and finished with a black phosphate and oil coating, these screws offer excellent corrosion resistance and a sleek, professional appearance. The integrated hex flange