Key Bellevilles, Inc.

Key Bellevilles manufactures Belleville disc springs, also known as conical or cupped springs, from an 88,000 square foot facility on more than 200 acres in Leechburg, Pennsylvania.

Founded in 1967, the company says it is the largest manufacturer of Belleville disc springs in the world, producing roughly 35 million springs in about 10,000 sizes and serving customers in more than 100 countries. Its springs are used across industries including aerospace, construction, drilling, refineries, and power plants.