Historical
SAE J 20-1-2009 (SAE J20-1-2009)
Coolant Hose (Supplement to SAE J20 for Government Use Replacing Part of MS52130) ( Reaffirmed: Jun 2009 )
This SAE Standard provides ordering information for any SAE 20R1 through SAE 20R4 hose type (such as EC, HT, LT, or combination thereof.) It is a supplement for Government use but may be used by others.
Society of Automotive Engineers [sae]