1586017-4 is a VAL-U-LOK free-hanging plug housing designed for double-row wire-to-wire connector applications with 4 positions. The housing is manufactured from 6/6 Nylon material with UL 94V-0 flame rating (CTI 600 V or more), providing excellent electrical insulation and mechanical durability. It features a 3.5 mm centerline spacing and is compatible with receptacle and tab contacts specified on page 50 of the datasheet. This connector housing is commonly used in industrial and automotive wire-to-wire interconnection applications where reliable, compact double-row connections are required, and it complies with RoHS regulations for hazardous substance restrictions.