The PJU664WF is a 6 x 6 x 4 Type 4X fiberglass polyester junction box from the PJU Series with a bonded polycarbonate viewing window in a lift-off screw cover and a mounting flange. The viewing window allows the interior to be seen with the cover closed. Typical uses are instrument enclosures, electric, hydraulic or pneumatic control housings, electrical junction boxes and terminal wiring enclosures, including locations that are hosed down, very wet, hot or highly corrosive.

The box and matching cover are compression molded fiberglass reinforced polyester in a light gray finish, with enhanced UV inhibitors for outdoor weathering, and are easily punched, cut or drilled. This version uses a lift-off cover secured by 4 stainless steel captive cover screws threading into #10-32 brass inserts; the cover removes completely for full access to the box. A captive oil resistant closed cell neoprene gasket provides a positive seal.

Enclosure dimensions are 6.05 in (154 mm) high, 6.27 in (159 mm) wide and 4.13 in (105 mm) deep (nominal 6 x 6 x 4 in), and the shipping weight is 3 lbs (1.36 kg). Threaded brass inserts accept the optional 14R0505 inner panel at 4.88 in (124 mm) by 4.88 in (124 mm), available in white powder coated steel, unfinished aluminum or fiberglass. For mounting, the PJU664WF comes with (2) polycarbonate flanges (glued) with (4) #10-32 brass inserts and stainless steel flange and feet screws; mounting hardware is included.

The series is listed to UL 508A Type 1, 2, 3, 4, 4X, 12 and 13 and cUL Type 1, 2, 3, 4, 4X, 12 and 13 per CSA 22.2 No. 94, and complies with NEMA Type 1, 2, 3, 4, 4X, 12 and 13 and IEC 60529 IP66. Operating temperature range is -40°C to 130°C (-40°F to 266°F) and the impact index is 6.78 J (5 ft/lb). RoHS and REACH compliant.