5/16-18 x 1 1/4 Coarse Thread Button Head Socket Cap Screw Plain DPODF meaning they are made of

meaning they are made of high-strength steel and are designed to withstand high torque and vibration

they feature a six-lobe drive for easy installation and a flat nibs design that countersinks cleanly into wood

while the gimlet point allows for easy penetration into wood

It is also heat treated to a hardness of 8

5/16-18 x 1 1/4 Coarse Thread Button Head Socket Cap Screw Plain DPODF meaning they are made of5 16 18 x 1 1 4 Coarse Thread Button Head Socket Cap Screw Plain is a type of screw with a button head and a coarse thread. It is made of plain steel and has a diameter of 5 16 inches and a length of 1 1 4 inches. The screw has a coarse thread with 18 threads per inch. The button head is rounded and has a slightly raised center. The screw is designed to be used in applications where a strong, secure connection is needed.