The #148 coupler will work anywhere a NO.5^® Coupler will work. The #148 coupler is a direct replacement for most Bachmann On30 couplers & a direct replacement for any plastic Medium Centerset "clone" couplers. 

The #148 Kadee^® Magne-Matic^® WHISKER^® Coupler features a All Metal Coupler, Metal WHISKER^® Centering Spring. The #148 Coupler may be mounted in Manufacturers cast-on coupler pockets or any of our HO-Scale draft gear boxes (except #233 30-series gear box). 
25 pair per package

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.