# Formula for shear stress concentration factor

**Q. The shear stress concentration factor (K**_{s}) in mechanical springs is given as _____*- Published on 14 Sep 15***a.** (1 + 0.5 / C)

**b.** 0.615 / C

**c.** (1 + 0.615 / C)

**d.** [(4C – 1) / (4C + 1)] + [0.615 / C]

**ANSWER: (1 + 0.5 / C) **