The 1018 is general purpose mild steel. Used for low grade nuts, bolts, dowell pins, and various fasteners.

Cold Rolled Steel

C 1018 Cold Rolled Steel
1/8″ Dia.1 1/8″ Dia.3″ Dia.
3/16″ Dia.1 3/16″ Dia.3 1/4″ Dia.
1/4″ Dia.1 1/4″ Dia.3 1/2″ Dia.
5/16″ Dia.1 5/16″ Dia.4″ Dia.
3/8″ Dia.1 3/8″ Dia.4 1/2″ Dia.
7/16″ Dia.1 1/2″ Dia.5″ Dia.
1/2″ Dia.1 5/8″ Dia.5 1/2″ Dia.
9/16″ Dia.1 3/4″ Dia.6″ Dia.
5/8″ Dia.1 7/8″ Dia.6 1/2″ Dia.
11/16″ Dia.1 15/16″ Dia.7″ Dia.
3/4″ Dia.2″ Dia.7 1/2″ Dia.
7/8″ Dia.2 3/16″ Dia.8″ Dia.
15/16″ Dia.2 1/4″ Dia. 
1″ Dia.2 1/2″ Dia. 

Hex and square Available

Larger Diameter Available Upon Request

Stainless Steel

T 303-304 Stainless Steel
3/16″ Dia3/4″ Dia.1 11/16″ Dia.
1/4″ Dia7/8″ Dia.1 3/4″ Dia.
5/16″ Dia1″ Dia.2″ Dia.
3/8″ Dia1 1/4″ Dia.2 1/4″ Dia.
1/2″ Dia1 3/8″ Dia.2 1/2″ Dia.
5/8″ Dia1 1/2″ Dia.3″ Dia.