Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders and reproducers, and parts and accessories of such articles 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 66 Parts and accessories suitable for use solely or principally with the machines of headings 84.56 to 84.65, including work or tool holders, self-opening dieheads, dividing heads and other special attachments for the machines; tool holders for any type of t Commodity Code Description 84 66 10 Tool holders and self-opening dieheads 84 66 20 Work holders 84 66 30 Dividing heads and other special attachments for machines 84 66 91 For machines of heading No. 84.62 84 66 92 For machines of heading No.84.65 84 66 93 For machines of headings No. 84.56 to 84.61 84 66 94 For machines of heading No. 84.62 or 84.63