Making the Case for Tension Indicating Fasteners On GlobalSpec

From Stress Indicators Inc.

When design engineers specify fasteners for product assemblies, systems or structures, they typically calculate the preload required for each bolted joint, then choose
fasteners to meet those requirements based on their strength and material properties.
However, not all bolted joints in a design or installation have equal importance. In addition to these requirements, special consideration must be given to bolted joints that are
critical to product operation, safety and reliability.

Read the Whole Article

Products & Services

Bolts

A bolt is a type of threaded hardware fastener that is used to position two workpieces in specific relation to each other. A bolt is specifically designed to be used with a mating, internally threaded hole or nut, which will maintain the bolt's alignment as well as the material's position on the bolt. While used synonymously, screws and bolts are not mechanical clones.

Search by Specification | Learn more about Bolts | Bolts Insights

Product Announcements

Standard Hex Head Cap Screws, SXS Series

Strainsert

Standard Hex Head Cap Screws (Steel Alloy), SXS Series from Strainsert Strainsert fasteners utilize an exclusive internal gaging method (U.S. Patent #2,873,341) to indicate bolt tension due to... (read more)

EZ-Glider Position Control Torque Arms

Mountz, Inc.

Encoder and easy to program controls allow for exact positioning for critical tightening sequence applications with EZ-Glider Position Control Torque Arms. (read more)

Standard Internally Gaged Studs

Strainsert

Standard Internally Gaged Studs (Steel Alloy), ST Series from Strainsert. Strainsert fasteners utilize an exclusive internal gaging method (U.S. Patent #2,873,341) to indicate stud tension due to... (read more)

Topics of Interest

Good news for bad vibes

Washers that add tension rather than friction keep bolted joints tight. Nord-Lock washers keep bolted joints tight in hydraulic hammers from Atlas-Copley. Nord-Lock washers are available in yellow...

Ensure Screws are Correctly Tightened in the Correct Sequence

Many joints consist of more than one fastener and bringing together surfaces that are not completely flat can be a very challenging torque problem. The sequence of tightening fasteners can have a...

Proper Fastener Selection and Application are Key to Bolted Joints That Won't Loosen or Lose Clamping Force

What's a nice bolt like you doing in a joint like this? The right fastener and proper installation methods keep bolted joints from loosening. Experimental Analysis of Thread Movement in Bolted...

Designing for Reliability

Though the uncertainties involved make exact predictions impossible, designers can solve many problems based on past experience, trial and error, tests, and the like. Much experience is accumulated in...

Custom bolt tensioners take the stress off users

Just about all industries and equipment use bolted joints. But some applications are less forgiving of possible bolt failure than others. Examples of critical bolted joints are found in the Space...