Part Number 1 4-20 X 1 HEX having (CAGE Code 9H691) and FSC 5305 Screws in stock with ready to ship. Get an instant quote for 1 4-20 X 1 HEX Screw Cap Hexagon Head by Arlington Fastner Co. 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.