2A Unified Thread Ring Gauge Set Fine Screw Gage Tools UN UNC UNF UNS 1/4 5/16 3/8 7/16 1/2 9/16 5/8 11/16 3/4 13/16 7/8 15/16Tools > Tool Parts31,73 USD (≈ 28,29 €)50,36 USDDisponibileSold by AliExpress WWVai al negozio