Taper pins are turned from bar stock, with a 1/4" taper per foot. Standard pins are made of steel. We can also furnish taper pins in stainless steel, alloy steel, or brass. All dimensions are given in inches. When ordering sizes other than those included in the above list, specify the length and the diameter at the large end. Standard reamers are available for pins given above the line. Pins Nos. 11 (size 0.8600), 12 (size 1.032), 13 (size 1.241), and 14 (1.523) are special sizes - hence their lengths are special To find small diameter of pin, multiply the length by 0.02083 and subtract the result from the large diameter.