Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number S-HS-4D-4SL found under Caster Swivel by K W D Manufacturing Inc. The National Stock Number assigned to this part is 5340015136084, and the Federal Supply Class is 5340 Hardware Commercial. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like S-HS-4D-4SL.