Fastener Strength
Calculate bolt holding capacity
Input Parameters
Valid
Tensile Capacity
0.00 kN
Formula
Capacity (kN) = (π × D² / 4) × Yield / 1000
Fill in the values on the left and click Calculate to see your result.
Formula
Capacity (kN) = (π × D² / 4) × Yield / 1000
Bolt tensile capacity based on cross-sectional area and grade yield strength.
Assumptions
- Perfect threading
- No surface damage
- Static load only
Step 1: Calculate bolt area
A = π × (20/2)² = 314.16 mm²
Step 2: Get yield strength
Grade 8.8: 640 MPa
Step 3: Apply formula
314.16 × 640 / 1000 = 201.06 kN
Frequently Asked Questions
What does bolt grade mean?
Grade indicates yield and tensile strength (e.g., 8.8 = 640 MPa yield).