The 1591RCBK is a black flame retardant ABS enclosure measuring 120 x 65 x 40 mm (4.72 x 2.56 x 1.57 in) with an RFI/EMI copper conductive coating inside. It is aimed at electronics engineers and OEMs who need a small plastic case with integral card guides for vertical PCB mounting plus shielding against electromagnetic and radio-frequency interference. With 40 mm of depth it offers more component headroom than the shallower 1591R sizes.

The interior of each enclosure part is specially masked and sprayed with the copper conductive coating, for which the coating manufacturer specifies an attenuation of more than 75 dB from 1 MHz to 1 GHz. The body is molded from flame retardant ABS carrying a UL94 V-0 rating and is designed to meet IP54. It has a smooth black finish with black screws.

The 1591C body drawing gives inside dimensions of 113.53 mm long, 58.53 mm wide and 35.90 mm high. Molded card guides on the internal side walls have a guide height of 30.91 mm and a slot width of 2.08 mm.

The lid is secured with M3 x 10 mm Phillips machine screws threaded into integral brass bushings, suited to repeated assembly and disassembly; the recommended torque is 35.5-42.5 ozf.in (25-30 cN.m). The purchased assembly includes the box, lid, 4 cover screws and pre-installed brass inserts. For surface mounting, the matching plastic flange kit is 1591FCBK.