ČSN ISO 13589 Letectví a kosmonautika : samojistné dvanáctihranné matice s válcovým zahloubením a MJ závitem. Třída : 1100 MPa/425 °C, 1210 MPa/425 °C, 1210 MPa/730 °C a 1550 MPa/600 °C. Rozměry = Aerospace. Nuts, bihexagonal, self-locking, with counterbore and MJ threads, classifications: 1100 MPa (at ambient temperature)/425 <Grad>C, 1100 MPa (at ambient temperature)/650 <Grad>C, 1210 MPa (at ambient temperature)/425 <Grad>C, 1210 MPa (at ambient temperature) 730 <Grad>C. 1550 MPa (at ambient temperature)/235 <Grad>C, 1550 MPa (at ambient temperature)/425 <Grad>C and 1550 Mpa (at ambient tempreture)/600 <Grad>C - Dimensions