StarTech Replacement PC Mounting Metal Jack Screw Standoff - 50 Pack SCREWNUT4_40 Keep handy #4-40 threaded standoffs commonly used for external D-sub connectors and cables Replacement PC Mounting #4-40 Metal Jack Screw Standoff - 50 Pack This 50 pack of Replacement PC Mounting (#4-40) Metal Jack Screw Standoffs are great to have on hand for new system builds, upgrades or repairs, providing a secure mount for external cables.