We provided 100 of these custom large socket cap screws to our aerospace customer together with custom oversize washers. A574 material was used for these parts, with minimum tensile strength of 170,000 psi, minimum yield strength of 154,000 psi, and rockwell hardness between 37 and 45. 1-1/4 -7 class 3A thread was required and the overall length underneath the head was 9 inches. MIL-DTL-13924 black oxide finish was done to complete the parts. All certifications requested by our customer were provided with the parts. Per their request the shank and threads of each socket screw had to be protected during handling and shipping.