8533: In addition to Paskenell's citation, here are a few more sources, also. (1) Barrett,
Fastener Design Manual, NASA RP-1228, 1990,
, p. 21, "In the absence of specific bolt shear strength values, the following approximations for bolt ultimate shear strength S
su may be used [for one or two bolts in line of force]. For alloy and carbon steel bolts, S
su = 0.60 S
tu, and for stainless steel bolts, S
su = 0.55 S
tu," where S
tu = bolt ultimate tensile strength.
(2) Kulak, et al.,
Guide to Design Criteria for Bolted and Riveted Joints, 2 ed., Wiley, 1987, pp. 44-50, "For high-strength alloy steel bolts [ISO grades 8.8, 10.9, SAE grades 5, 8], S
su = 0.62 S
tu for one or two bolts in line of force."
(3) Fisher, "Structural Steel and Steel Connections," 2002,
(1.45 MB), p. B-5, Eq. B-3, "Ultimate shear strength of a single [high-strength alloy steel] bolt is S
su = 0.62 S
tu."