Sankhwalkar was first picked in the national side in 1975, following his success at the club level. He played for the team at the AFC Youth Championship in Kuwait in that year and also the following year. He was a part of the team that participated at the Marah Alim Cup in Kabul in 1976 and 1977, the Merdeka Cup in 1976, 1981, 1982 and 1986.
Sankhwalkar was first selected to the national team in 1975 after achieving success at the club level. He played for the national team at the AFC Youth Championship in Kuwait in both 1975 and 1976, as well as the Marah Alim Cup in Kabul in 1976 and 1977, and the Merdeka Cup in 1976, 1981, 1982, and 1986.