Grade 9

Grade 9 Fasteners

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Grade 9 Fasteners
Grade 9 fasteners, also referred to as L9 or PFC 9, are high strength allow steel fasteners.  They are distinctly stronger than grade 8 fasteners as shown in the chart below.

Strength Comparison Chart:  Grade 9 vs. Grade 8

 
  Grade 9 (L9) Grade 8
Material High Strength
Alloy Steel
Medium Carbon /
Alloy Steel 
Proof Load psi 145,000 120,000
Tensile Strength min. psi    180,000 150,000
Yield Strength min. psi     155,000 130,000
Rockwell Hardness C38 - C42 C33 - C39

 


 

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