The manufacturing Purchasing Managers' Index, or PMI, rose to 47.0 in May from 46.6 in April.

A PMI reading below 50 suggests a contraction in the sector.

Output, new orders, and employment all declined at slower rates than in April. Manufacturers cut their workforce for the 12th time in a row in May.

Nonetheless, the rate of job shedding eased. Input and output prices both fell at a survey-record pace, while suppliers' delivery times improved the most in a decade.

As a result of improved supply chains, inputs were more readily available, delays in transport were reduced, and supplier terms were more favorable.