>> Search results for: SMC20177ITEM1 NSN Search Results National Stock Number (NSN) Description 4520-01-273-1393, 4520012731393 DAMPER,FLUE 2040-01-284-6595 , 2040012846595 DAMPER,MULTI-LOUVER 4520-01-273-1392, 4520012731392 DAMPER,FLUE 2040-01-305-6938 , 2040013056938 DAMPER,MULTILOUVER 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