TECHNICAL LIBRARY
Technical Library
Common problems in fastener design and procurement, addressed from the perspective of a manufacturer with over 50 years in the trade.
All 17
Materials & Grades
Strength & Mechanical Properties
Design & Selection
Finishes & Regulations
Quality & Testing
Strength & Mechanical Properties
A2-50, A2-70, A2-80 — What Is the Difference?
What stainless property classes mean, and how to choose. Why the same STS304 can have different strengths.
A2-70A2-80A2-50A4-80
Strength & Mechanical Properties
4.8 · 8.8 · 10.9 · 12.9 — How to read steel bolt property classes
First number is nominal tensile strength, second the yield ratio. Nominal values versus the standard's minimums, how old 4T/8T marks relate, materials and hydrogen embrittlement, and why tapping screws are excluded.
bolt property class4.88.810.9
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