Genstar Capital is buying manufacturing group Tecomet Inc.

Tecomet, headquartered in Wilmington, Mass., makes components for the medical device, aerospace and defense markets. Terms of the deal were not disclosed.

Genstar, a San Francisco private equity firm, has more than $4 billion in capital under management. The firm focuses on investments in the industrial technology, health care, financial services and software industries. In July, the firm’s portfolio company, MW Industries Inc., bought Mohawk Spring Corp. 

Private equity firm Charlesbank Capital Partners sold Tecomet. The firm has more than $2 billion in capital under management, and focuses on investing between $50 million and $150 million per transaction.

James Clark, Geoff Smith, Whit Knier, Turner Bredrup, Jon Nemo, Bill Roman and Trey Packard from Harris Williams & Co. acted as financial advisers to Charlesbank.