The South African Railways Class B 0-6-4T of 1893 was a steam locomotive from the pre-Union era in Transvaal. Between 1893 and 1898, 175 Class B 0-6-4 tank engines were placed in service by the Nederlandsche-Zuid-Afrikaansche Spoorweg-Maatschappij in the Zuid-Afrikaansche Republiek.