/ 21
/ 21.6
/ 21H7
/ 22
/ 22.15
/ 22.2
OSG / 1 1/4-12UNF
/ 23
/ 24H7
/ 25H7
/ 26
OJIYA SEIKI / PT1/8-28
OJIYA SEIKI / 7/8-14UNF-2A