Growth for the FIN Fastener Stock Index moderated in the first quarter of 2017.

After posting a 20% increase in 2016, the FINdex rose only 9.1% in the opening quarter of 2017, compared to an 5.1% gain by an index of related industrial stocks during the period.

Arconic was the biggest winner in stock value during Q1. Overall stock results for Arconic, which includes Alcoa’s former $1.8 billion Fastening Systems and Rings business, jumped 42% during the period.

Other companies gaining 10% or more in share value during 2016 included Dorman Products (up 12.4%); EACO (up 11.2%); MSC Industrial (up 11.2%); and Stanley Black and Decker (up 15.8%).

But the opening quarter took its toll on some publicly traded companies with fastener holdings.

Fastener companies losing 5% or more in share value during Q1 included Lawson Products (down 5.7%); Park Ohio (down 15.6%); TriMas (down 11.7%); and Wesco Aircraft (down 23.7%).

In 2016, the FINdex posted impressive gains, rising 20% during the year, compared to an 11.1% increase by an index of related industrial stocks.

Chicago Rivet & Machine Co. was the biggest winner in stock value during 2016, with shares climbing 78.4%.