Gainline Capital Partners has purchased M&M International (M&M), a manufacturer of precision-engineered stainless-steel tubing primarily for the medical device end market. Neither company disclosed the deal’s terms.

“We are excited to build on M&M’s 30-year track record of supplying customers with high-quality products,” Gainline Managing Partner Allan Weinstein said. “M&M is well positioned for accelerated organic growth and we plan to pursue strategic add-on acquisitions to further advance its position in the market.”

In conjunction with the acquisition, Jeff Robertson was appointed CEO. Robertson is an experienced leader in the medical device manufacturing industry and worked most recently as chief operating officer of Solesis. Joining Robertson are Ed Graf as chief financial officer, and Chris Pleibel as chief commercial officer. “Jeff, Ed, and Chris bring a wealth of experience and proven track records of scaling businesses,” Gainline Principal Rob Dellinger stated. “We are thrilled to partner with them in the next stage of M&M’s growth.”

M&M produces 304 and 316-grade stainless steel small-diameter tubing for medical devices and other high precision applications. M&M also recently launched its 17-7 stainless steel product offering, further expanding its market position. “We are pleased to introduce 17-7 as part of our product portfolio,” Robertson commented. “This expansion reinforces our commitment to providing high-quality, specialized solutions that address the evolving needs of our customers. By broadening our capabilities, we are positioned as an even stronger partner in supporting their critical applications.”

The acquisition of M&M comes at a particularly active time for Gainline as it deploys its second Fund. Last week the firm announced a majority investment in IMS Technologies, a leading audiovisual and systems integration company based in Pennsylvania.

Gainline Capital Partners is a private equity firm that invests in U.S.-based middle-market companies. The firm invests in established, growth-oriented companies prioritizing first institutional capital partnership opportunities, helping execute management teams’ vision, driving sustainable growth, and creating long-term value.

Founded in 1993 and headquartered in South Plainfield, N.J., M&M manufactures precision-engineered small-diameter stainless steel tubing (SDSST) for mission-critical medical device applications. With a diverse product offering, M&M offers high quality tubing at attractive price points.