NO.5® Mounting with supplied (#232 draft gear box)  NO.5® Mounting with manufactures cast-on coupler pockets NO.5® Mounting Dimensions The NO.5® Kadee® Magne-Matic® Coupler features a Metal Coupler, #634 Centering Spring, insulated #232 Draft Gear Box and Lid with side and center screw holes for mounting. The NO.5® Coupler may be mounted with supplied #232 draft gear box or with manufactures cast-on coupler pockets. It is not recommended to use a metal coupler directly on a metal surface or in a metal draft gear box to avoid the possible electrical crossover or shorting that may cause damage. Use the provided insulated draft gear box or use the very strong plactic isolated #28 Coupler which has the same mounting dimensions as the NO.5® Coupler. Two pair per package