The Time Mark HDC-1 Hold Down Clamp is constructed of stainless steel brackets and is joined with a rubber O-ring. The clamp is designed to secure the socket-mounted relay against vibration.

The Hold Down Clamp is attached to the Time Mark Model 51X120 8-Pin Socket with enclosed mounting hardware.

This clamp is made to fit all Time Mark and Signaline socket-mounted relays (Note: This product was previously designated as Model 98A535).