Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 3M943E5-4-4 found under Pin Shoulder Headle by B And B Specialties Inc. The National Stock Number assigned to this part is 1560015752564, and the Federal Supply Class is 1560 Airframe Structural Components. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 3M943E5-4-4.