Grace Socket FHS M4 35 mm

note image may not be exact,

“Grace canada Socket FHS M4 35 mm” refers toPEM FHS-M4-35self-clinching threaded studs

PEM self-clinching studsare installed by placing them in properly sized holes in the sheets and squeezing into place with any standard press. The squeezing action embeds the head of the stud into the sheet. The metal displaced by the head flows smoothly and evenly around the ribs and into the annular groove creating a flushhead assembly and securely locking the stud into the sheet with high torque-out and pushout resistances.