The Hidden Risk Sitting in Your Direct Materials

The hidden risk sitting in your direct materials

June 1, 2026
By Bruce Brinkman | Director of Sales - OEM Development

It's far too easy to underestimate the importance of direct materials. We often think of a fastener as merely a part that costs a few pennies. The lack of capital tied to it almost implies that it's not worth a second thought.

But what if you don't have those fasteners? Suddenly, you're looking at a line-down situation. Worse still, what if you use defective fasteners? There's nothing sudden about that. You won't know something was wrong until your customers start calling about failures.

So many direct materials are more important than we give them credit for. Fasteners in particular are literally holding your product together. Seen through this lens, you start to see the true value of a trustworthy supply chain.

With throughput and customer trust on the line, why are these materials often being managed using systems from decades ago?

"The way we've always done it."

Supply chain problems don’t start with bad intentions. No one chooses to do things the hard way. Instead, the challenges we face today are often byproducts of time and convenience.

A part was designed years ago. A supplier was approved under different volumes, different conditions, different expectations. Then, production changes. Usage changes. The work environment itself changes. But the part, and the process around it, stay the same.

Each decision made sense in the moment, but over time, those separate choices create unintentional blind spots.

This is how you end up with:

Components that technically meet specifications but don't perform the way they should in the real world
Parts that require excessive inspection or rework just to keep production moving
Inventory that's padded "just in case" because no one truly trusts the supply chain anymore

Documentation as a form of protection

For many manufacturers, a surprising amount of critical knowledge lives in people’s heads. Someone knows how a part should look. Someone else knows what to check when it comes in. Another person knows which supplier “usually” gets it right.

That works … until it doesn’t.

To turn organizational knowledge into repeatable processes, you need documented procedures, inspection criteria, and quality standards. Those processes make expectations clear across shifts and locations.

Now, the goal isn’t paperwork. (No one wants paperwork.) The goal is repeatability. When everyone understands what the right way looks like, problems have a harder time popping up.

Seeing the whole picture, part by part

As the number of direct materials grows, so do the challenges around managing them. One part is easy. Ten is manageable. Hundreds or thousands? That requires a system.

This is where a structured approach like either OEM Mapping or a Plan for Every Part becomes valuable. The PFEP strategy is simple. Know what’s going on in your business at a level that makes decision-making easier.

PFEPs include:

Usage data
Criticality
Lead time
Qualification status
Substitution limits

When this data (and so much more) lives in one place, you gain visibility into where risk is actually hiding. In a manufacturing environment, a PFEP highlights which parts deserve deeper scrutiny, which ones offer opportunities for improvement, and which ones may be carrying more cost (and risk) than necessary.

For OEM Mapping, everything starts with observation. At Fastenal, we have our team walk your production line, watch assemblies come together, and see where operators slow down, where parts pile up, and where workarounds have become “normal.”

From there, engineering teams often go fastener by fastener evaluating:

Component design and selection
Opportunities to standardize and reduce part count
Alternatives that improve install time or quality consistency

This combination of Lean processes and engineering analysis is what separates OEM Mapping form a sourcing exercise.

The takeaway

Many of the systems used to manage direct materials were built for a more stable world. Today’s environment is different. Volatility, staffing constraints, and demand fluctuations are putting those systems under stress, making visibility and repeatability more important than ever.

Your next big opportunity may not come from a new supplier or a lower price. Instead, it’s much more likely to come from understanding which parts truly carry risk and where small changes can deliver outsized returns. Both PFEPs and OEM Mapping offer a structured way to gain that clarity.

Sometimes, the biggest improvements start by asking a simple question: Has anyone ever looked at our operation this way before?

The goal is simple: You want to move beyond managing parts in isolation and start understanding the system they operate in. When that happens, improvements develop naturally.