Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 18D4230-1 found under Fixture Assembly Holding Interfa by Vt Milcom Inc. The National Stock Number assigned to this part is 4920014638987, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 18D4230-1.