The 1590WBB2 is a taller take on the 1590BB footprint: 120 x 94 x 38 mm nominal, with 33.50 mm of inside height and an IP65 rating when its silicone gasket is fitted. The natural aluminum box has no mounting flanges and is aimed at electronics designers and OEM teams housing wide boards with taller components.

The box and lid are made from diecast aluminum alloy, which is tough yet easy to machine, and carry a natural aluminum finish that is vibra finished for a smooth surface with no sharp edges. A lap joint where lid and box meet guards against dust and splashing water, and a side wall draft angle of 2° or less eases PC board mounting. The maximum P.C. board dimensions listed for this part are 84.83 mm and 110.33 mm.

The listed size of 1590WBB2 is 4.7 in x 3.7 in x 1.49 in (119 mm x 94 mm x 38 mm), and the series ordering table gives a nominal 4.72 in (120 mm) x 3.70 in (94 mm) x 1.50 in (38 mm). It has no mounting flanges, so the outside is a clean rectangle of 119.50 mm [4.705 in] by 94.00 mm [3.701 in] by 37.75 mm [1.486 in] on the drawing. Inside, the drawing gives 113.77 mm [4.479 in] of length, 88.27 mm [3.475 in] of width and 33.50 mm [1.319 in] of height; the lid height is 0.16 in (4 mm).

As a watertight version it is designed to meet IP65 and includes a silicone gasket, supplied loose inside the enclosure rather than pre-installed. The purchased assembly includes box, lid and 4 cover screws that thread into factory-tapped 6-32 UNC holes. Recommended torque is 50-55 cN.m [71-78 ozf.in], or 25-30 cN.m [36-43 ozf.in] with the gasket fitted. Replacement gasket kit 1590BBGASKET holds two pre-formed, adhesive-backed silicone gaskets.

It is RoHS and REACH compliant, ships in shrink wrap at 0.51 lbs (0.23 kg), and solid models are available in .stp or .x_t.