Abstract: A corrosion-protective cover 3 is molded of a synthetic resin. The corrosion-protective cover 3 includes a base plate portion 29 having a battery post insertion hole, first hook portions 30 and 30 formed at a rear end of the base plate portion 29 so as to be engaged with a wire connection portion 9, and a second hook portion 31 of a generally U-shape which is formed at a front end of the base plate portion 29, and has elasticity, and can be retainingly fitted on curved surfaces 40 and 40 of fastening portions 6 and 6, with the first hook portions 30 and 30 engaged with the wire connection portion 9.

Abstract: An electric wire connecting portion 7 comprises a plate portion 17 and a folded side plate portion 18 continuing to the plate portion 17. This plate portion 17 includes a stem hole 19 for inserting the stem 12 of a stud bolt 4 exclusively, and a plurality of locking projections 20 confront the head side faces 13 of the stud bolt 4. The folded side plate portion 18 includes a folded portion 21 continuing to the plate portion 17, and a head holding portion 22 confronting the head top face 14 of the stud bolt 4 at the folding time. The folded side plate portion 18 is provided, on its two sides and separately of the locking projections 20, with folded side locking protrusions 23 confronting the head side faces 13 of the stud bolt 4. These folded side locking protrusions 23 are provided with notches 27 for inserting and fitting the locking projections 20 therein.

Abstract: An electric wire connecting portion 7 comprises a plate portion 17 and a folded side plate portion 18 continuing to the plate portion 17. This plate portion 17 includes a stem hole 19 for inserting the stem 12 of a stud bolt 4 exclusively, and a plurality of locking projections 20 confront the head side faces 13 of the stud bolt 4. The folded side plate portion 18 includes a folded portion 21 continuing to the plate portion 17, and a head holding portion 22 confronting the head top face 14 of the stud bolt 4 at the folding time. The folded side plate portion 18 is provided, on its two sides and separately of the locking projections 20, with folded side locking protrusions 23 confronting the head side faces 13 of the stud bolt 4. These folded side locking protrusions 23 are provided with notches 27 for inserting and fitting the locking projections 20 therein.

Abstract: A corrosion-protective cover 3 is molded of a synthetic resin. The corrosion-protective cover 3 includes a base plate portion 29 having a battery post insertion hole, first hook portions 30 and 30 formed at a rear end of the base plate portion 29 so as to be engaged with a wire connection portion 9, and a second hook portion 31 of a generally U-shape which is formed at a front end of the base plate portion 29, and has elasticity, and can be retainingly fitted on curved surfaces 40 and 40 of fastening portions 6 and 6, with the first hook portions 30 and 30 engaged with the wire connection portion 9.

Abstract: In a nut disengagement prevention structure, a bolt has an external thread. A nut which is thread on the bolt has an internal thread. A thread portion which is the closest to a leading end of the bolt has a first minor diameter. Any other portion of the thread of the bolt has a second minor diameter which is smaller than the first minor diameter. The second minor diameter is substantially identical with a minor diameter of the internal thread of the nut.

Abstract: In a nut disengagement prevention structure, a bolt has an external thread. A nut which is thread on the bolt has an internal thread. A thread portion which is the closest to a leading end of the bolt has a first minor diameter. Any other portion of the thread of the bolt has a second minor diameter which is smaller than the first minor diameter. The second minor diameter is substantially identical with a minor diameter of the internal thread of the nut.