Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number R1892-4C5 found under Screw by Teledyne Technologies Inc. The National Stock Number assigned to this part is 5305010063697, 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 R1892-4C5.