Thread Tensile Stress Area

For steels over 100,000 psi ultimate tensile strength

At: tensile stress area (inch²)
E_smin: minimum pitch diameter of external thread for the class of thread specified (inch)
n: number of threads per inch

	At
	E_smin
	n

An Introduction To The Design and Behavior of Bolted Joints
Third Edition, John H. Bickford