Kadee 148-50 Standard Head All-Metal Whisker(R) Self-Centering Knuckle Couplers - 50 Pack

#148 Medium (9/32inch) Centerset Shank (same as #5 but spring wire installed into the shank) - 50 Pack All-metal -whisker- coupler with metal self-centering spring. Designed and tested for reliability, durability and long life. Compatible with Kadee HO couplers. Fits most HO scale equipment; can be used in place of No. 5 coupler. Easier to install into the coupler box. Less parts to assembly.