The SCGM4 is a small replacement pack of M4 ground screws for 1590Z series diecast aluminum enclosures. The short description identifies it as a "1590Z M4 GROUND SCREW PACK 2x", making it the part to order when an M4 ground screw has been lost or needs replacing during maintenance or rework of a 1590Z installation.

The screws are copper and are listed by the manufacturer under the Hardware category with the type "Screws". 1590Z enclosure drawings show copper M4 ground hardware for the lid on some models, and this pack covers the M4 size.

The pack ships in a box with a shipping weight of 0.01 lbs (0.00 kg). It is RoHS compliant and REACH compliant, and is classified under UNSPSC 39121301 with UPC 623980133355.

For larger quantities, the 1590Z series ordering table lists a separate SCGM4-50 pack as the extra panel screws for sizes such as 1590Z100, 1590Z120, 1590Z125 and 1590Z140. For the M6 ground screws used elsewhere in the 1590Z series, the corresponding replacement pack is SCGM6. Electricians and OEM assemblers can keep both on hand so that any 1590Z enclosure can be re-grounded after the lid or internal hardware has been removed.