Danfoss Drives
Danly springs
Data Industrial Corp
Data Instruments (Honeywell)
Dayco belts
Dayco hydraulic
Delroyd gear reducers
Deming pumps
Deublin rotary unions
Dezurik
Diamond chain
Diamond grinding wheels
Domnick Hunter
Dowty pumps
Dura valves
Durco Pumps
Dwyer gauges
......