Grade 12.9 12-Point Flange Bolts (1/4"-3/4" Inch)

Engineered for high-load applications, these Grade 12.9 12-point flange bolts are crafted from premium black alloy steel, delivering exceptional tensile strength and torque resistance. Featuring a half-thread design and hex flange head, they ensure stable seating and reduced vibration loosening. Available in inch sizes 1/4" to 3/4", the black oxide finish enhances wear and corrosion resistance, making them ideal for industrial machinery, automotive powertrains, and heavy-equipment assemblies requiring reliable, high-strength fastening.