The 1421J6BK is a six-piece pack of black #6-32 x 1/4 assembly screws. Its part page short description is "Self-Tapping Screws BK 6 Pack", and the manufacturer's small case hardware list assigns it to the 1401, 1411, 1412, 1415, 1426, 1431, 1434, 1441, 1444, 1451, 1452, 1454 and 1456 series.

It is the black counterpart to the 1421J6, making it the pack to reach for when the replacement fasteners should match a black-finished build. Six screws per pack is enough to restore the assembly screws on a single unit without buying bulk quantities, which suits repair technicians, lab and bench users, and OEM service stock.

The manufacturer points out that most enclosures ship with all hardware needed for assembly, so this is a replacement item. Because hardware packs may not suit every part in the listed series, confirm compatibility on the series landing page or in the "Replacement Parts and Accessories" section of your enclosure's part page.

1421J6BK is RoHS and REACH compliant, with a shipping weight of 0.02 lbs (0.01 kg). The non-black equivalent is 1421J6; an eight-screw pack with the same #6-32 x 1/4 description is 1421J8.