The purpose of this SAE Recommended Practice is to provide dimensions for both standard and thin-wall hoses and to provide commercial and precision tolerances for SAE 20R3 and SAE 20R4 coolant system hoses.
SAE J2387-2010 history
2021SAE J2387-2021 Dimensions and Tolerances for Coolant System Hoses
2010SAE J2387-2010 Dimensions and Tolerances for Coolant System Hoses
2003SAE J2387-2003 Dimensions and Tolerances for Coolant System Hoses
1997SAE J2387-1997 Dimensions and Tolerances for Coolant System Hoses