STRONGER TOGETHERA2-70 / A4-70 / A4-80
For stainless fasteners, A2 and A4 identify material groups while 70/80 relate to mechanical strength class. Corrosion environment, temperature, mating material and galling risk should be checked for the application.
ÇETİMUR
A2-70 / A4-70 / A4-80
A technical RFQ guide for purchasing and engineering teams.
A2-70 / A4-70 / A4-80
Before ordering
Use the current standard revision, manufacturer datasheet and project specification. A title or standard number alone does not establish technical equivalence.
- Identify the part and revision.
- Describe application, environment and acceptance criteria.
- Include document requirements and sourcing restrictions.
- Resolve exceptions and alternatives with technical approval.
Sources and updates
Editor: ÇETİMUR technical content. Updated 6 October 2026. General guidance, not design approval.