Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AS20253-4-378L found under Pin Straight Headle by Sae International. The National Stock Number assigned to this part is 5315016014730, and the Federal Supply Class is 5315 Nails Machine Keys And Pins. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like AS20253-4-378L.