part 125521 Nut, Locking (M25 x 1) Cat Pumps code 125521 Details Cat Pumps number125521 DescriptionNut, Locking (M25 x 1) Qty per pump1 Fits these pumps Cat Pumps Plunger pumps 4 66DX30G1I66DX35G1I66DX40G1I66DX50G1I