Shares in Hi-Shear Technologies Inc. closed up 9.5 percent Tuesday after the aerospace company announced surprising first-quarter earnings.

Hi-Shear reported net income for the quarter ending August 31 of $1.1 million (17 cents per share), a 83 percent jump from $607,000 (9 cents) the company reported for the same period a year earlier.

Shares for the Torrance-based maker of satellite and other aerospace parts also surged 36 percent to $5.7 million.

Shares in Hi-Shear closed up $1.13 to $13 in trading Tuesday on the American Stock Exchange.