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Bolt Torque & Clamp-Load Calculator

Determine proper torque settings for fasteners based on size, grade, and lubrication conditions.

Fastener Specifications

Percentage of bolt proof strength to use for preload

Torque & Clamp Load

Recommended Torque:
Clamp Load:
Proof Strength:
Tensile Strength:
Thread Pitch:

Notes & Recommendations

  • Always use a calibrated torque wrench for critical applications.
  • Torque values assume clean, undamaged threads.
  • For critical joints, consider angle-based tightening methods.
  • Recheck torque after initial tightening and after first loading.
  • For safety-critical applications, consult engineering standards.