USS pattern flat washers are manufactured from low carbon steel to meet ASTM F844

1 1/4-7 Nylon Insert Locknut Zinc Plated

the zinc plating can help it perform durably and stand up against the elements over the long-term

1/2-13 x 16 A307 Grade A Carriage Bolt HDG

All material is manufactured with rolled threads

1 3/16 x 6 Reduced Shank Drill Bit (1/2 Shank) M24-3.00 Hex Cap Screws DIN 933 18-8 Stainless Steel (A2) USS pattern flat washers are1 3 16 x 6 Reduced Shank Drill Bit (1 2 Shank) . Expands the size range capacity of a 1 2 inch portable drill chuck. Common flute and overall length for minimal adjustment during tool changes. Precision ground for high degree of concentricity between shank and body diameter. Ideal for drilling in low and medium tensile strength materials.