Bolts and Screws, Steel, Low Alloy, Heat Resistant 135 000 psi Tensile Strength, Normalized and Tempered, Roll Threaded
This procurement specification covers aircraft quality bolts and screws made from a low alloy, heat resistant steel of the type identified under the Unified Numbering System as UNS K14675. AS7454 ~ 135 000 psi ultimate tensile strength at room temperture. AS7454-1 ~ 135 000 psi ultimate tensile strength at room temperture, nickel-cadmium plated.
Primarily for aerospace propulsion system applications where good strength at temperatures up to approximately 900 °F
is required and the part is protected against corrosion.
Rationale: Added additional definitions to para 2.2. Update para 3.6 by adding “two to” three threads in agreement with NASM1312-8 test methodology. Added para 4.2 and completely revised para 4.4.3, 4.4.5 and TABLES 3, 4, 5 and 6 by removing sampling in accordance with MIL-STD-105 (AQL) and replacing with accept on “zero”. General updating for SAE requirements for obsolete specifications and standards.