Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TYLENOL W CODEINE NO. 4 TABLETS found under Codeine Phosphate A by Mcneil Corp. The National Stock Number assigned to this part is 6505002368951, 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 TYLENOL W CODEINE NO. 4 TABLETS.