QUIC-CHECK® Shoulder machinery bolt made of forged steel (quenched and tempered). It has M-279 metric threaded. Fatigue rated at 1-1/2 times the working load limit at 20000 cycles. These bolts meet other critical performance requirements including fatigue life, impact properties and material traceability, not addressed by ASME B30.26. Meets or exceeds all requirements of ASME B30.26 including identification, ductility, design factor, proof load and temperature requirements. Recommended for in-line pull.