Our Products Connector Series Female Header, PCMICA Socket (PNB) Pitch-2.54 x 2.54mm Pitch-2.54 x 2.54mm Photo Series Product Name Download Product Info. PNB41C 2.54 x 2.54mm Female Header (3.5mm) PNB41D 2.54 x 2.54mm Female Header (4.5mm) PNB41E 2.54 x 2.54mm Female Header (5.5mm) PNB41F 2.54 x 2.54mm Female Header (6.6mm)