Part Number 04-00392 having (CAGE Code 1DJG0) and FSC 5310 Nuts and Washers in stock with ready to ship. Get an instant quote for 04-00392 Washer Concave by Irwin Industrial Tool Company. Fill the form below with your desired order quantity, targeted price and the expected order-fulfilment date. Our dedicated account manager will get back to you within 15 minutes.