Milton S-1751 Safety Exhaust Coupler, 1/4" body, 1/4" MNPT https://smile.amazon.com/dp/B07QZ69G64/ref=cm_sw_r_apan_i_XYNC2F3KBXWBGMM5CW85?_encoding=UTF8&psc=1

Just that fits a schrader chuck