Hammond 18G4521 45 x 21 In Galvanized Steel Enclosure Inner Panel

The 18G4521 is a 45 x 21 in (1143 x 533 mm) galvanized steel inner panel from Hammond's 18P Series, sized for a wallmount enclosure measuring 48 x 24 in (H x W). It gives panel builders, electricians and OEM engineers a flat sub-panel for mounting equipment inside the enclosure. The 18P Series covers inner panels for 1418, 1447, PJW and PHW wallmount enclosures.

The series specification describes the galvanized panels as 12 gauge unpainted galvanized steel. Hammond's short description for this part reads "GALV PANEL FOR WALLMT 48X24". The same specification notes that some larger panels in the series are 10 gauge. The part drawing shows a material thickness of 0.10 in. This is a tall, narrow panel: 45 in long against only 21 in wide. Because of that proportion the drawing uses six mounting holes, two columns 19.25 in apart with three rows on 21.63 in pitches, which adds a mid-height fixing point along each long edge.

Per the series ordering table, the panel measures 45.00 in (1143 mm) long by 21.00 in (533 mm) wide and is matched to an enclosure 48.00 in (1219 mm) high by 24.00 in (610 mm) wide. The drawing specifies six 0.50 in diameter mounting holes, spaced 19.25 in across the width and 21.63 + 21.63 in along the length.

Panel mounting hardware is not included with the 18G4521; the series specification notes that it is provided with the enclosure. The part is listed as RoHS and REACH compliant, and ships in a box with a shipping weight of 32 lbs (14.51 kg). The same size is also listed in steel (18P4521).