CALIFORNIA WARNING: This product can expose you to chemicals, including lead and DEHP, which are known to the State of California to cause cancer and birth defects, or other reproductive harm. For more information, go to https://www.p65warnings.ca.gov.
4-40 thread x 1/2 inch overall press fit PEM stud with 11/64 inch head diameter.
Flat head machine screw is used on ramps, flaps and mechanical assemblies. Press them into a drilled or punched hole with an arbor press or similar pressure tool.
Also known as self-clinching studs, ribs under the head hold the stud firmly in place.
Reference:
20-9348