Fatigue rated at 1-1/2 times the Working Load Limit at 20,000 cycles
S-279 threaded UNC
M-279 metric threaded
Meets or exceeds all requirements of ASME B30.26 including identification, ductility, design factor, proof load and temperature requirements; importantly, these bolts meet other critical performance requirements including fatigue life, impact properties and material traceability, not addressed by ASME B30.26