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Metric Grades Steel Bolts

Metric steel bolts, screws and studs - proof and tensile strength

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Class Head Marking Size Range
(mm)
Minimum Proof Strength
(106 Pa)
Minimum Tensile Strength
(106 Pa)
Material
4.6 SAE steel bolt M5 - M36 225 400 Low or medium carbon steel
4.8 SAE steel bolt M1.6 - M16 310 420 Low or medium carbon steel
5.8 SAE steel bolt M5 - M24 380 520 Low or medium carbon steel
8.8 SAE steel bolt M16 - M36 600 830 Medium carbon steel, Q & T
9.8 SAE steel bolt M1.6 - M16 650 900 Medium carbon steel, Q & T
10.9 SAE steel bolt M5 - M36 830 1040 Low carbon martensite steel, Q & T
12.9 SAE steel bolt M1.6 - M36 970 1220 Alloy steel, Q & T
  • 1 Pa = 1 N/m2 = 1.4504x10-4 lb/in2 (psi)

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Related Topics

  • Mechanics - Kinematics, forces, vectors, motion, momentum, energy and the dynamics of objects

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