The SCGM6-20 is a 20-piece pack of M6 x 10mm copper screws and washer, described by Hammond as replacement M6 ground screws for the 1590Z series. It is aimed at electricians, integrators and OEM builders who need to restore or add a ground connection on a 1590Z enclosure.

The Small Case Hardware ordering table lists the SCGM6-20 under two hardware types for the 1590Z series, Ground Screws and Panel Screws, both with the description "M6 x 10mm copper screws and washer". The part page short description is "1590Z M6 GROUND SCREW 20 PACK", the material is copper and the part is catalogued as Hardware, type Screws.

The screws ship in a plastic clamshell with a listed shipping weight of 0.24 lbs (0.11 kg). At 20 per pack, this is a sensible quantity for a batch of 1590Z enclosures or a maintenance kit.

Hammond enclosures in most cases include all the hardware needed for assembly, so the SCGM6-20 is intended as a replacement. Hardware packs may not be compatible with every part in a listed series, so check the series landing page or the "Replacement Parts and Accessories" section on the enclosure's part page to confirm. For 1590ZGRP models, Hammond lists a separate M6 ground screw pack, SCGM6GRP-20.

The SCGM6-20 is RoHS compliant and REACH compliant.