Fastener Grades & Markings
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Product Group |
BSW Hex Bolt & Nut |
Metric Hex Bolt & Nut |
BSW Cup Head Bolt & Nut |
Metric Cuphead Bolt & Nut |
Metric Coach Screw |
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Mild Steel Commercial |
Grade 2 | Class 4.6 | Grade 2 | Class 4.6 | Class 4.6 |
Product Specification |
AS2451-1998 | AS1111-2000 (Bolt) AS1112-2000 (Nut) |
ASB108-1952 (Bolt) AS2451-1998 (Nut) |
AS1390-1997 (Bolt) AS1112-2000 (Nut) |
AS1393-1996 |
Nominal Strengths |
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Bolt Tensile |
63,000 lb/in2 | 400MPa | 58,000 lb/in2 | 400MPa | 400MPa |
Bolt Yield |
36,000 lb/in2 | 240MPa | 240MPa | 240MPa | |
Bolt Proof |
225MPa | 225MPa | 225MPa | ||
Nut Proof |
63,000 lb/in2 | 520-630MPa* | 63,000 lb/in2 | 520-630MPa* | |
Grade Marking |
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* See Nut Property Class Table Below
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Product Group |
UNC/UNF High Tensile Bolt & Nut |
UNC/UNF High Tensile Bolt & Nut |
Metric High Tensile Bolt & Nut |
Metric Structural Bolt & Nut |
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| Grade 5 | Class 8 | Grade 8.8 | Class 8.8 | |
Product Specification |
AS2465-1999 | AS2465-1999 | AS1110-2000 (Bolt) AS1112-2000 (Nut) |
AS1252-1983 |
Nominal Strengths |
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Bolt Tensile |
105,000-120,000 lb/in2 | 150,000 lb/in2 | 800MPa | 800MPa |
Bolt Yield |
81,000-92,000 lb/in2 | 130,000 lb/in2 | 640MPa | 640MPa |
Bolt Proof |
74,000-85,000 lb/in2 | 120,000 lb/in2 | 580MPa | 600MPa |
Nut Proof |
UNC 120,000 lb/in2 UNF 109,000 lb/in2 |
150,000 lb/in2 | 800-920MPa* | 1165MPa |
Grade Marking |
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* See Nut Property Class Table Below
| Thread | Nut Property Class | |||
| Greater Than | Less Than or Equal To | 5 Style 1 |
8 Style 1 |
8 Style 2 |
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Stress Under Proof Load |
Stress Under Proof Load |
Stress Under Proof Load |
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| - | M4 | 520 MPa | 800 MPa | - |
| M4 | M7 | 580 MPa | 855 MPa | - |
| M7 | M10 | 590 MPa | 870 MPa | - |
| M10 | M16 | 610 MPa | 880 MPa | - |
| M16 | M36 | 630 MPa | 920 MPa | 890 MPa |
Information provided as a guide by Bremick Fasteners