Performance Grade (Grade):

• 8.8, 10.9, 12.9 (Carbon Steel Grades)
• A2-50, A2-70 (Austenitic Stainless Steel Grades)
• A4-80 (Marine Grade Stainless Steel)
• B8, B8M (ASTM Grades)
• A453 GR (High Temperature Grade)

Material:

• Carbon Steel
• Stainless Steel:
  • Class A (Austenitic)
  • Class C (Martensitic)
  • Class F (Ferritic)
  • Class FA (Ferritic-Austenitic)
• Special Heat-Resistant and Corrosion-Resistant Steel:
  • F55 (Super Duplex)
  • 660A (Precipitation Hardening)
  • 2205 (Duplex)
  • 630 (17-4PH)
  • 310S (High Temperature Resistant)

Size:

• Metric: M6-M100
• Imperial: 1/4"-4"

Standards:

• GB (Chinese National Standard)
• JB/ZQ (Chinese Industry Standard)
• ISO (International Standard)
• DIN (German Standard)
• ANSI/ASME (American Standard)
• JIS (Japanese Standard)
• BS (British Standard)