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Bolts, Screws and Studs, Nickel Alloy, UNS N07718 Work-Strengthened, Tensile Strength 220 ksi Procurement Specification
- Aerospace Standard
- AS5270A
- Revised
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
This procurement specification covers bolts, screws, and studs made from a work-strengthened corrosion and heat resistant, age hardenable nickel base alloy of the type identified under the Unified Numbering System as UNS N07718. The following properties are covered:
-
220 ksi minimum ultimate tensile strength at room temperature
-
180 ksi minimum ultimate tensile strength at 900 °F
-
114 ksi tension to 11.4 ksi tension fatigue at room temperature
Rationale
Most paragraphs have been modified, AS6416 added. Paragraphs 3.7.2.6.2 and 3.7.2.6.3 added, all figures have been redrawn for clarity.
Data Sets - Support Documents
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| Table 1 | UNJ ext thread depth at 2h/3 and allowable thread lap depth | |
| Table 2A | Test loads for bolts and studs | |
| Table 2B | Test loads for screws | |
| Table 3 | Summary of acceptance tests | |
| Table 4 | Sampling data non-destructive tests visual and dimensional characteristics for classes major a, major b, minor a, and minor b | |
| Table 5 | Classification of visual and dimensional characteristics | |
| Table 6 | Sampling data destructive tests, mechanical and metallurgical characteristics |
Issuing Committee
E-25 General Standards for Aerospace and Propulsion Systems
The SAE E-25 General Standards for Aerospace & Propulsion Systems committee addresses aerospace propulsion systems and components. These systems and components include bolts, screws, nuts, washers, studs, rivets, pins, covers, O-rings, brackets, plugs and associated procurement requirements, as well as solid film lubricants and design specifications for screw threads and fastener assembly requirements.
Reference
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