Type A adapters are generally used with the same size Type D couplers, however, Type B and C couplers are compatible, as well as the DC (Dust Cap).

Quick action chuck with female thread - BSP
type A 19 SS, G3/4", (A3/4"SS)
type A 25 SS, G1", (A1"SS)
type A 32 SS, G1 1/4", (D1 1/4"SS)
type A 38 SS, G1 1/2", (D1 1/2"SS)
type A 50 SS, G2" (D2"SS)
type A 63 SS, G2 1/2" (D2 1/2"SS)
type A 75 SS, G3" (D3"SS)
type A 100 SS, G4" (D4"SS)