2007-02-09-SD550-IMG_3631

Raw water pump array mounting stud. 1/4" x 1 1/4" stainless steel bolt, on exterior side is a stainless steel / rubber sealing washer, on inside is this 1/4" stainless steel fender washer, spacer nut & 1/4" jam nut to form mounting stud. Medium strength lock tight used on this jam nut.