The First Compression-Based Load Indicating Fastener

The SPC4® Compression Bolt (Pat. Pending)

The first fastener of its kind to directly indicate compressive load. The SPC4® Load Indicating Compression Bolt (Pat. Pending) is a load-indicating fastener designed for compression applications in even the most extreme environments. Originally developed to increase visibility within the yaw braking control system of wind turbines, the bolt directly indicates compressive load within +/- 10% accuracy.

+ Utilizing our patented, best-selling SPC4® Load Indicating Technology

+ Pair with a variety of SPC4® Accessories to monitor load remotely and optimize installation. Bluetooth options are available.

+ Can be used in a variety of applications where compressive load is applied

"WECS is excited to be working with Valley Forge & Bolt Mfg. Co. on the New Yaw System compression Gauge, and we are prepared to start field testing at local wind sites soon."

- Denny Mckissic V.P. O&M, WECS Renewables