Hammond 1591BTCL 112x62x31 mm Crystal Clear Polycarbonate Enclosure

The 1591BTCL is a Crystal Clear polycarbonate project box in a 112 x 62 x 31 mm case, a step up in length and width from the 1591A size. It suits engineers who need to keep a printed circuit board, its sensors or its indicators visible while still enclosing it against dust and splashing water.

The Crystal Clear version is almost totally transparent, letting you see parts, sensors or indicators inside without opening the lid. The case is molded from flame retardant translucent polycarbonate that is easy to machine, and lap joint construction between box and lid provides protection against access of dust and splashing water. It is designed to meet IP54 and is listed as RoHS and REACH compliant.

The drawing gives overall dimensions of 112.00 x 62.00 x 30.80 mm (4.409 x 2.441 x 1.213 in). Inside it measures 105.78 x 55.78 x 26.90 mm, room for a slightly larger board than the 100 mm size while staying under 31 mm deep. Integral card guides accept 1.5 mm (0.062 in) PC cards, with a guide height of 21.90 mm and a slot width of 2.13 mm.

The purchased 1591BTCL assembly includes the box, lid, 4 cover screws and pre-installed brass inserts. The lid is secured with M3 x 10 mm Phillips machine screws threaded into integral brass bushings at a recommended torque of 42-57 ozf.in (30-40 cN.m); replacement screws are part number 1591MS100. The same size is also offered as 1591BTBU and 1591BTRD in the other translucent tints. Some chemicals can damage or weaken plastic, so check chemical compatibility before cleaning or modifying the case.