Tests were conducted on single and multiple rivet single tow lap joint shear specimens, and on singles rivet tension specimens, using AN426 100°countersunk head and AN456 brassier head rivets of 17S material driven in the T, or hard, condition. For comparison AN426 24ST rivets driven quenched were also tested. As a result of these tests, it was decided that the allowable shear strengths for both 178T and 24ST rivets might be increased.
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