what are axle keys for
Store SKU # 572315. These axle keys (also known as key stock) are square precut keys used to lock two moving parts into place when installed into a pre-cut keyway. This key is straight, and made of carbon steel. California residents: see Proposition 65 information. 1  1 Piece per pack. 2  Steel construction. 3  Plain finish. 4  5/16 in. 5  x 2-1/2 in.