The combined company primarily made screws and other fasteners until the 1950s, when they diversified into fuel injection pumps and consumer faucets.
[2] In May 1947 a deal was made with Vernon D. Roosa to come to Hartford Machine Screw and perfect his fuel injection pump for diesel engines.
The project initially cost more than expected with some directors in favor of abandoning, but by 1952 major bugs had been eliminated and the product was ready for market.
However, the oil crisis of the 1970s and General Motors' decision to install diesel engines in passenger cars, significantly stimulated pump sales.
In 1956, a deal was struck with Ravenna Metal Projects to acquire the company's first real consumer product — the single-handle faucet developed by Alfred M. Moen.