A Complete Guide to Industrial Fastener Types for NC Manufacturers

A fastener failure rarely announces itself in advance. One day a bracket is holding fine; the next, a machine guard is loose or a conveyor mount has worked itself free — and the line is down until someone figures out why. Most of the time, the root cause traces back to a fastener that was close enough on paper but wrong for the actual application.

We stock and sell industrial fasteners to mills, plants, and fabrication shops across North Carolina, and the question we hear most often isn’t “which brand” — it’s “which type.” There are dozens of fastener types, each built for a specific combination of load, material, and environment. This guide walks through the main categories, how they differ, and what to consider before you order a case of the wrong one.

The Main Categories of Industrial Fasteners

Industrial fasteners break down into three broad groups: threaded, non-threaded, and specialty.

Threaded fasteners — bolts and screws — use spiral ridges to create a mechanical grip that can be tightened, loosened, and reused. Non-threaded fasteners, like rivets and pins, form a permanent or semi-permanent connection without threading, usually by deforming the fastener itself once it’s in place. Specialty fasteners cover everything that doesn’t fit neatly into those two buckets: anchors for securing equipment to concrete, washers that distribute load and prevent loosening, and nuts that pair with bolts to complete a threaded joint.

Most manufacturing and mill environments use a mix of all three. A conveyor system, for example, might use bolts for the frame, rivets for sheet metal panels, and anchors to secure the whole assembly to the floor. We carry the full range in-stock, so a mixed order doesn’t mean a mixed shipping schedule our full line of industrial anchors and fasteners.

Threaded vs. Non-Threaded Fasteners: What’s the Difference

The decision between threaded and non-threaded usually comes down to one question: will this joint ever need to come apart again?

Threaded fasteners win when disassembly matters. Maintenance, equipment swaps, and seasonal reconfiguration all favor bolts and screws, because they can be removed without damaging the parts they’re holding together. Self-tapping screws in particular are common in sheet metal fasteners applications, where cutting a separate thread ahead of time isn’t practical.

Non-threaded fasteners win when the joint is permanent by design. Rivets, for instance, are common in structural sheet metal work because they resist vibration loosening better than a bolted joint under constant motion — there’s no thread to back out. The tradeoff is that removing a rivet means drilling it out, not unscrewing it.

Neither option is inherently “better.” It depends on whether the connection needs to be serviceable or whether permanence is actually the goal.

What Are the Different Types of Anchor Bolts?

The five most common anchor bolt types are wedge anchors, sleeve anchors, drop-in anchors, epoxy anchors, and chemical anchors — each rated for a different combination of base material, load direction, and removability.

Wedge anchors are the workhorse for solid concrete and handle both shear and tension loads well. Sleeve anchors are more forgiving of slightly oversized holes and work in concrete, brick, or block. Drop-in anchors are internally threaded, which makes them useful when you need a reusable connection point. Epoxy and chemical anchors bond the fastener into the substrate with an adhesive rather than mechanical expansion, which makes them the go-to choice for high-vibration equipment mounts or when you’re anchoring close to the edge of a concrete slab.

Getting anchor bolt selection wrong usually shows up as a loose base plate weeks or months after installation — by which point the equipment has already been run on an unstable mount. It’s worth confirming the base material and load type before ordering, not after. Once the anchors are set, you’ll also need the right hand tools to install them correctly he torque wrenches and drivers used to install them.

Choosing Fasteners for NC Mill and Manufacturing Environments

North Carolina’s manufacturing base — from textile and paper mills to metal fabrication shops — puts fasteners through conditions that a generic hardware store product isn’t built for. Humidity inside a textile mill accelerates corrosion on untreated steel fasteners. Heavy equipment on a fabrication floor puts sustained vibration loads on anchor points. And older mill buildings, common across Raleigh and the surrounding manufacturing corridor, often have concrete or masonry that’s inconsistent enough to matter when you’re choosing between a wedge anchor and a chemical anchor.

We work with manufacturers across Raleigh and the surrounding manufacturing facilities [LINK: /industrial-supplier-raleigh-nc/ | anchor: “Raleigh manufacturing facilities”] as well as the mills and processing plants around Durham [LINK: /industrial-supplier-durham-nc/ | anchor: “Durham mills and processing plants”], and the fastener specs that work for a dry, climate-controlled facility often aren’t the right call for an older mill building with higher humidity and vibration exposure.

Not sure which fastener grade your application needs? Call (919) 777-9807 — our inside sales team will match you to spec.

Fastener Materials and Coatings That Matter

Once you’ve settled on a fastener type, material and coating decide how long it lasts in service. Standard zinc-plated fasteners handle mild indoor environments fine and cost less up front. Hot-dip galvanized fasteners hold up better outdoors or in higher-moisture settings, at a moderate cost increase. Stainless steel is the top tier for corrosion resistance — the right call for washdown areas, chemical exposure, or coastal-adjacent humidity — but it costs meaningfully more than plated alternatives.

The mistake we see most often isn’t choosing the wrong fastener type — it’s choosing the right type in the wrong material for the environment it’s going into. A zinc-plated bolt in a high-humidity mill application might hold fine for a year and then start failing in clusters as the coating wears through. In some cases, a structural adhesive is actually a better fit than a mechanical fastener for vibration-heavy joints — we cover that tradeoff in our guide to industrial adhesive types when adhesive bonding outperforms mechanical fasteners.

Frequently Asked Questions

What are the five basic types of fasteners?
Bolts, screws, nuts, washers, and rivets are the five basic fastener types, each serving a distinct joining function based on load and reusability needs.

What is the strongest type of fastener?
High-strength structural bolts — Grade 8 or higher — generally offer the highest tensile strength for load-bearing industrial applications.

How do I know which fastener to use?
Match the fastener to the load type, the material being joined, and the environmental exposure. If you’re not sure where to start, our sales team can help you spec it based on the actual application.

Do anchor bolts and screws serve the same purpose?
No. Anchor bolts secure equipment to concrete or masonry, while screws typically join two lighter materials together and are meant to be removable.

The Bottom Line on Fastener Types

Getting fastener selection right isn’t about memorizing every type in the catalog — it’s about matching load, material, and environment before you place the order. The wrong fastener costs you twice: once in the part, and again in the downtime when it fails.

We stock the full range of industrial fastener types NC manufacturers rely on, from standard bolts and screws to anchor systems built for demanding mill environments.

Call (919) 777-9807 or stop by our Sanford location — we stock the industrial fastener types NC manufacturers need, in-hand, today.