DIN 65542 : 1987 Title: Aerospace; countersunk head screws, close tolerance, with ribbed TORQ-SET (ACR) recess and MJ thread, short thread length, nickel alloy, nominal tensile strength 1250 MPa, for temperatures up to 315 °C/425 °C Year: 1987 Publisher: DIN Media GmbH Availability: Within 1-2 working days