31 Jul 1/4 28 UNF 3B SPECIAL THREAD PLUG GAGE .25 .250 GO NO GO P.D.’S = .2237 & .2260
1/4 - 28 UNF - 3B SPECIAL. SPECIAL THREAD PLUG GAGE. ”Gage was protected very good. Will buy from you again.”. Thread Gages. plain Pin Plug Gages. ONLY THE GO HAS A CERT. NO GO P.D....