1/2 x 2 1/2 Socket Shoulder Screw Plain 3PP188 which means that it is

which means that it is designed for use in applications where weight is a concern

This 5/16-18 x 2 1/2 inch fully threaded carriage bolt is made of Grade 5 steel and has a zinc finish for corrosion resistance

This 8-11 x 1 1/2 Phillips Pan Deep Thread Wood Screw is designed for use in woodworking applications

This 10-32 x 7/16 slotted round machine screw is made of zinc and is fully threaded

1/2 x 2 1/2 Socket Shoulder Screw Plain 3PP188 which means that it is1 2 x 2 1 2 Socket Shoulder Screw Plain is a type of screw that has a hexagonal head with a socket in the center. The socket allows for easy driving with a wrench or socket driver. The screw has a shoulder that sits against the surface of the material being fastened, providing additional support and preventing the screw from pulling through the material. The plain finish of the screw provides a clean, professional look.