Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number BL8410 found under Float Switch Assemb by Nash Engineering Company Inc The. The National Stock Number assigned to this part is 4630009964843, and the Federal Supply Class is 4630 Sewage Treatment Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like BL8410.