1.1 This specification covers externally threaded bolts, studs, and cap screws as defined in , herein called fasteners, capable of indicating clamping forces up to yield strength during the tightening process or post installation residual tension, or both. Load-indicating fasteners utilize mechanical, electronic, or ultrasonic means to indicate fastener tension.1.2 This specification covers bolt diameters 1/4 to 7 in. inclusive.1.3 These fasteners provide a means to verify the