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Best Practices for Military Fastener Maintenance

Blake Marciszewski

Blake Marciszewski

Metric Bolt is a family run company with an inventory of military fasteners.

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Metric Bolt discusses military fastener maintenance.

In the realm of military hardware, fasteners play a paramount role, often overlooked yet integral to the robustness and reliability of every piece of equipment. 

Whether it’s an aircraft, a ground vehicle, or advanced weaponry, every component is held together by these essential elements. 

Fasteners bear the weight and pressure of military operations, making their maintenance a crucial aspect of ensuring longevity, reliability, and overall operational success.

With that being said, this blog post is dedicated to shedding light on the best practices for military fastener maintenance, helping to extend the lifespan and improve the performance of these crucial components. So, let’s take a look:

1. Regular Inspection

Fasteners in military hardware are exposed to harsh conditions, varying temperatures, pressures, and mechanical stresses. 

Regular inspections can help detect any early signs of wear, corrosion, or damage. 

Experts recommend performing a thorough check before and after each operation. 

This check should involve visual inspection for visible signs of wear and advanced techniques like ultrasonic testing to identify any internal damages or inconsistencies.

Here are quick-fire steps for carrying out a regular inspection:

  • Gather all necessary tools and safety equipment. This might include a flashlight for better visibility, a magnifying glass for detailed inspection, gloves for protection, and any necessary measurement tools or gauges.
  • Wipe down the fastener and its surrounding area to ensure visibility and accuracy during the inspection. Use non-abrasive materials and avoid harsh chemicals that might damage the fastener or its protective coating.
  • Check for visible signs of damage such as corrosion, discoloration, cracks, or deformations. Look for any signs of excessive wear in the threads or head of the fastener.
  • Verify that each fastener is at the correct torque. Be aware of any that are too loose or too tight, as both can cause problems.
  • Measure the dimensions of the fastener to ensure that they meet the specified tolerance. Any change in the original dimensions may indicate wear or deformation.
  • Check for any signs that the fastener has been moving or shifting. This could include unusual wear patterns, markings, or loosening of the fastener.
  • Don’t just focus on the fastener. Examine the materials and components around the fastener. Look for signs of stress, cracks, or deformation that could impact the fastener’s effectiveness.
  • In some cases, you can use non-destructive testing techniques, such as ultrasonic testing or magnetic particle inspection, to detect internal flaws or cracks that aren’t visible to the naked eye.
  • Document the results of your inspection, noting any fasteners or components that need further attention or replacement.

2. Lubrication

The use of lubrication is a significant factor in enhancing the durability of fasteners. By lowering friction and wear, it contributes to their longevity and serves as a barrier against rust – a frequent concern for fasteners in challenging conditions.

In the process of selecting a suitable lubricant, the ability to endure the range of operational temperatures, and the resistance to water and potential corrosive agents, are critical considerations.

3. Proper Torquing

Over-torquing and under-torquing can both compromise the integrity of fasteners. As such, it’s essential to follow the manufacturer’s guidelines for torque settings. 

Always use calibrated torque tools to ensure accuracy. 

Remember, proper torquing is not just about ensuring fasteners are secure; it’s also about maintaining the structural integrity of the fastener and the component it holds.

4. Use of Correct Materials and Coatings

Military hardware is subjected to extreme conditions that can induce corrosion and wear in fasteners. Therefore, using fasteners made from the correct materials and coatings can significantly reduce these issues. 

For example, stainless steel, titanium, and aluminum alloys are known for their corrosion resistance and durability. Coatings like zinc, cadmium, and nickel can add an extra layer of protection.

5. Regular Fastener Replacement

Even with the best maintenance practices, fasteners have a finite lifespan. It’s important to replace them at regular intervals to avoid failures that could jeopardize entire operations. 

Keep track of each fastener’s service life and ensure replacements are on hand well before the end of their expected lifespan.

6. Maintain a Fastener Database

A database that keeps track of all the fasteners in use, their installation dates, maintenance schedules, and replacement intervals can be a valuable tool. 

This database can be part of a broader predictive maintenance strategy, allowing for preemptive actions that will help avoid fastener failures.

7. Training Personnel

Finally, the most comprehensive maintenance protocol won’t be effective unless the personnel carrying it out are adequately trained. 

Regular training programs can ensure that everyone involved is up-to-date with the best practices and latest developments in fastener technology and maintenance procedures.

Following the Best Practices for Military Fastener Maintenance

The importance of maintaining military and aerospace fasteners cannot be overstated. By adhering to these best practices, military units can optimize the life and performance of their fasteners, enhancing the reliability of their equipment and, ultimately, the success of their operations.

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