Part Number H42LO4 having (CAGE Code K1678) and FSC 5310 Nuts and Washers in stock with ready to ship. Get an instant quote for H42LO4 Nut Self Locking Extended Washer by Fairchild Fasteners Uk Ltd. 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.