Standard Force Sensing Load Pins/Bolts, CPA/CBA Series

The CPA/CBA Load Pins and Bolts are unique load sensors utilizing the internal strain gage transducer process developed by Strainsert and used also in their Flat Load Cells® and Tension Links. These load pins and clevis bolts offer precision force measurement by replacing existing shear pins, clevis bolts, load pins, shear axles and many other types of pinned joints for the aerospace, automotive, marine and military industries.

Click Here for our Load Pin Quick Start Guide for help with setup and installation of our Load Pin products.


The Strain gages are sealed inside small axial holes within the load pin and are positioned at two locations at the Clevis to Clevis Eye interfaces. In order to sense only those strains which are induced by the shear forces at these two sections, the strain gages are positioned and oriented with great precision, at a neutral plane relative to one specific direction of pin loading.

The four strain gages (two at each location) are electrically connected to form a full bridge, the signal from each strain gage being additive so that the bridge output is proportional to the sum of the loads transmitted by the shear planes of the pin. The circuit typically includes temperature compensating, signal trim (optional) and balance resistors terminating in suitable connector socket or integral cable.

Standard models include detailed calibration data up to 500,000 lbs. Higher capacity calibration data is available at an additional charge. Strainsert factory calibrations are intended to simulate installed conditions, however, it is recommended that an in-place calibration be performed to account for any installation, tolerance, and/or alignment influences affecting sensor measurement.

Some Features Include:

  • Precison Load Sensing
  • Rugged
  • Internally Sealed Strain Gages
  • Easy Installation
  • Direct Force Measurement
  • High Strength Stainless Steel


These standard clevis pins are typically used in new applications where the designer can develop the specific load pin joint around the standard clevis pin dimensions, to optimize force measurement performance. In addition, for existing load pin joints, the standard clevis pin may fit or can be incorporated through the use of bushings or modifying the clevis assembly. For information on custom designs, see custom load pins

Strainsert - for superior internally gaged force transducers.

Strainsert stands for:

  • Product Quality
  • Knowledgeable Technical Staff
  • Standard and Custom Designs
  • Customer Service
  • Comprehensive Testing

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For information on load pins, force sensing bolts, load cells, tension links or our high quality custom products, Contact Us for further assistance.