>> Search results for: VDH21M NSN Search Results National Stock Number (NSN) Description 4520-01-134-3502, 4520011343502 Cancelled -> Replaced by 4520012604379 4520-01-175-5028 , 4520011755028 HEATER,VENTILATION,DUCT TYPE 1 Related Inventory Search You can use this search box to continue searching. Search parameters can include any combination of characteristics, specifications, description, partial part numbers, NSN or other stocking number. Special characters are not needed and are automatically stripped before searching. Do you sell this part? Become part of our growing pool of certified suppliers. Send Information