THIS IS A SCHWINN STAMPED S BOLT USED ON OLDER SCHWINN MANY MANY BIKES ,,IT A AUTHENTIC SCHWINN PART IN NEVER USED CONDITION, ,,,,,,THIS FITS THE STINGRAY BIKES FASTBACKS MANTA RAY AND THE STINGRAY KRATE BIKES,,,FITS ROAD BIKES AND MANY SCHWINN BALLOON TIRE BIKES,,,,,,ITS THE SAME BOLT AND NUT USED ON THE SCHWINN ROAD BIKES ,,VARSITY COLLEGENT AND SUBURBAN AND MOST MIDDLE WEIGHT BIKES AND MANY BALLOON TIRE BIKES,,,,,FITS TO 99% OF MOST SCHWINN BIKES LIKE THE SCHWINN TYPHOON CORVETTE JAGUAR AND MOST OTHER SCHWINN BIKES FROM THE 40S 50S 60S AND THE 70S.