Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HAL4 48 found under Screw Eye by Allen Vanguard Corporation. The National Stock Number assigned to this part is 5305999731020, and the Federal Supply Class is 5305 Screws. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HAL4 48.