M3,5 M4 Asta Barra Borchia Esagonale Giunto Connettore Dado Lungo Raccordo Ottone
M3.5 M4 Long Rod Coupling Hex Nuts Connector Brass Hex Connection Hexagon Nut. Not easy to rust, deep thread, even tooth path, no burr, clear grain, no slipping. Made of high quality brass, anti-corrosive and durable.