American Securities LLC has agreed a deal to buy Grede Holdings LLC, a maker of cast iron components for the transportation and industrial sectors, for just north of $800 million, according to people familiar with the matter.

The deal is conditional on factors including regulatory approvals and isn’t expected to close until summer, according to one of the people.

Goldman Sachs Group Inc.GS +1.61% is leading a lender group, which also includes GE Capital Markets and Nomura Holdings Inc.8604.TO +2.88%, that’s providing $675 million of financing for the deal. S&P Capital IQ LCD earlier reported details of the financing.

Wayzata Investment Partners and GSC Group, an investment firm founded by former Goldman partner Alfred Eckert III, became majority owners of the company following a restructuring in 2010. A year later, Black Diamond Capital Management bought the majority of the GSC’s investment management business after GSC filed for bankruptcy protection.

Grede has earnings before interest, taxes, depreciation and amortization of more than $150 million, according to two of the people. The Southfield, Mich.-based company has estimated annual revenue of more than $1 billion and has 4,700 employees, according to its website.