Classes of Internal Threads and Classes of Taps Description of products P class Pitch Basic Pitch Dia. Sizes JIS class 2 HT,SP,PO class 2 JIS class 2 HT,SP,PO class 2 JIS class 2 SP,PO HT class 2 JIS class 2 HT,SP,PO class 2 JIS class 2 HT,SP,PO class 2 JIS class 2 SP HT,PO class 2 JIS class 2 SP HT,PO class 2 JIS class 2 SP HT,PO class 2 JIS class 2 SP HT,PO class 2 JIS class 2 SP HT PO class 2 P class Pitch Basic Pitch Dia. Sizes JIS class 2 SP HT PO class 2 JIS class 2 SP HT PO class 2 JIS class 2 SP HT,PO class 2 JIS class 2 SP HT,PO class 2 JIS class 2 SP HT,PO class 2 JIS class 2 SP HT,PO class 2 Information Technical Technical-15