6410-32-20 HYDRAULIC ADAPTER 2" MALE BOSS X 1 1/4" FEMALE BOSS (Tube O.D. / Hose I.D. Size)
THREAD SIZES FOR 6410-32-20 HYDRAULIC ADAPTER 2 1/2"-12 MALE BOSS X 1 5/8"- 1 1/16"-12 FEMALE BOSS
To measure threads, Calipers work very well.