Unified thread ring gauge set 2A 1/4-28 Fine Screw Gage tool UN UNC UNF UNS 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16Tools > Tool Parts37,32 USD (≈ 33,40 €)50,43 USDDisponibileSold by AliExpress WWVai al negozio