This is a high-strength, heat-resistant fastener assembly designed for high-temperature and high-pressure applications.
Technical Specification
1. Component Description
- Stud Bolt: Continuous threaded rod with flat or chamfered ends.
- Heavy Hex Nuts: Two matching heavy-duty hexagonal nuts per stud for high load distribution.
2. Material and Grade
- Standard: ASTM A453 / A453M
- Grade/Class: Grade 660 Class A (A286 iron-base superalloy)
- Property: Precipitation hardened for high tensile strength and stress-rupture resistance up to 1200°F (650°C).
3. Dimensional Specifications
- Diameter: 1 3/8 inch (1.375' / 34.93 mm)
- Thread Pitch: 8UN (8 threads per inch, Unified National Coarse pitch series for 1'+ diameters)
- Length: 220 mm (measured from first to last usable thread)
- Nut Dimension Standard: ASME B18.2.2 (Heavy Hex Series)
- Stud Dimension Standard: ASME B18.31.2 or ASME B16.5
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