Blessed Bolts or Freaking Fasteners Or Bolt Basics!

Bolts and screws are not something that occupies a lot of our reliability thoughts. After, the life of an appropriate bolt in a non-aggressive environment has been extrapolated to something like 11,000 years. Yet if you use the wrong fastener, it is bound to be very aggravating. It may not even survive its own virgin installation!

Luckily, there are some visual cues to help guide against using the wrong fastener. The following table shows grading of common US and Metric fasteners.

Maybe one day we will only have just the same system and less confusion. But you know the saying; “US is changing to the Metric standard inch by inch.” 

US Bolts (SAE J429)

Metric Bolts (ISO R898)

metric bolts

*Load= Minimum load bolt must handle without permanent deformation.
**Strength (tensile)= Minimum load bolt must handle before braking or fracturing.

Condition Monitoring Standards

Learn the WHAT and WHY of Inspections

IDCON's Condition Monitoring Standards books are a colorful and unique collection of 100 standard instructions for operations, crafts people and engineering to use as field manuals for preventive maintenance. Each condition monitoring book is organized by component types such as AC motors, couplings, pumps, valves, belts, chains, gears and much more.

At IDCON, we understand the pressure you face trying to build a reliable plant.
We provide side-by-side reliability and maintenance consulting and training designed to keep your equipment running.

For over 45 years, we’ve partnered with 100s of manufacturing plants around the world to eliminate the costs and the pressure caused by unreliable equipment. And we’d love to do the same for you.

Contact us today to see how we can help you keep your plant running.

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Michael Lippig

Senior Consultant - IDCON, Inc.

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