CCMP Capital Advisors has agreed to purchase Oak Hill Capital Partners' controlling interest in The Hillman Companies in a transaction valuing the company at $1.5 billion. Oak Hill Capital will retain a minority stake in the company. Originally a fastener and keys company when founded in 1964, Hillman distributes over 130,000 SKUs such as fasteners, letters, engraved tags, builder's hardware and more for commercial and residential uses. It has over 26,000 retail customers worldwide. Oak Hill Capital bought its stake in Hillman for around $815 million in 2010.