National Hardware Ordering Checklist: Flat Bars, U Bolts, Eye Bolts, Socket Sets, and Locking Pliers

This checklist is for the person who orders hardware as part of a bigger job: office administrator, maintenance coordinator, shop supervisor, or whoever gets told to just buy some U bolts. I have been handling purchasing for an industrial maintenance company since 2020. I am not a mechanic and I am not an engineer. My job is to make sure the order the mechanic asks for is the order that shows up.

The list below covers five requests I see over and over: national hardware flat bar, national hardware zinc plated U bolt, Durasteel coarse thread eye bolt, 163 piece socket set, and locking pliers. This is not a full product manual. It is a short spot-check routine I use before approving any of those lines.

Start with total cost, not unit price

It is tempting to compare hardware suppliers by unit price alone. That works when every specification is identical and every delivery is smooth. In practice, it does not work very often. I did not fully understand this until an order of 60 flat bars in early 2022 arrived with no finish specified. The parts were usable in a dry interior room, but the crew had requested them for an outdoor gate. The gate got delayed, the parts had to be reordered, and the original bars just sat in storage. That was not a supplier problem. It was an ordering problem. The total cost of that mistake was a lot more than the difference between a good quote and a bad quote.

Since then I calculate total cost before comparing prices: unit price, freight, promised delivery date, return policy, and, hardest to measure, what happens if the line item is wrong. The checklist below is how I lower the last risk.

1. National Hardware flat bar: check finish, dimensions, and holes

A National Hardware flat bar looks like a boring product. It is a steel strip with holes, or sometimes without holes. Boring products get ordered too fast. I have learned to slow down and confirm three things before I put a flat bar on a purchase order.

• Material and finish. Plain steel, zinc plated, galvanized, or stainless. If the bar will live outdoors or near moisture, plain steel is usually the wrong answer. Zinc helps, but it is not the same as stainless in a corrosive location.
• Width, thickness, and length. A difference of 1/16 inch in thickness changes strength and bolt fit. Do not write bar stock length and assume the width is obvious.
• Hole pattern. If you need holes, know the diameter, spacing, and distance from the end. If no holes are mentioned, say no holes. Otherwise the warehouse may pick a standard drilled bar that is not correct.

One phrase fixed most of my early flat-bar mistakes: National Hardware flat bar, zinc plated, 12 in. x 1/8 in. x 3/4 in., holes at 4 in. centers. If I cannot write a full phrase like that, I have not finished the check.

2. National Hardware zinc plated U bolt: name the part that has to fit

A National Hardware zinc plated U bolt often supports pipe, conduit, or a post. The trap is the word fit. If someone says it fits a 2-inch pipe, I ask what that means. Does the curved inside of the U bolt match the pipe outside diameter, or is the number just the nominal pipe size? Those are not the same.

When I order a zinc plated U bolt now, I confirm four numbers: inside width between the legs, leg length from the top curve to the thread end, thread size, and center-to-center distance of the legs. I also ask about the environment. Zinc plated is a fine finish for many indoor and protected outdoor jobs, but it is not a universal outdoor finish. If your gate or post is around road salt, you may want a more corrosion-resistant material. The extra cost is usually small compared with replacing 50 rusted U bolts and the labor to unbolt them.

3. Durasteel coarse thread eye bolt: match the thread to the receiving material

A Durasteel coarse thread eye bolt is not automatically interchangeable with another eye bolt that has the same eye size. The eye size is only one part. The thread type, thread length, and intended load all affect the order.

Coarse thread is common on fasteners, but coarse is a comparison. Many machine thread sizes have both coarse and fine pitch: 1/2-inch-13 is coarse; 1/2-inch-20 is fine. If the eye bolt is going into a tapped hole or a nut, the two must match. If it is a wood thread eye bolt, it will look different from a machine thread eye bolt. I check the listing before I choose.

I also ask about load. If someone says the eye bolt is for lifting, I treat that as a separate product decision. An ordinary hardware eye bolt is not a rated lifting point. Use a properly rated eye bolt with markings and documentation when the application is overhead or safety-related. That is a line I do not cross.

4. 163 piece socket set: count sets, not just pieces

When a technician asks for a 163 piece socket set, the number sounds complete. I still open the product sheet. The piece count usually includes sockets, extensions, adapters, screwdriver bits, and sometimes hex keys. That does not make it a bad buy. It just means I need to know what I am actually stocking.

• Drive sizes and units. Does the set include 1/4-inch, 3/8-inch and 1/2-inch drive sockets? Are both SAE and metric sizes included, or one system only?
• Shallow and deep sockets. If the job list says deep well, a set without deep sockets will not work, no matter how impressive the total piece count is.
• Six-point or twelve-point. Six-point sockets fit hex bolts more securely. Both have a place, but I do not assume every socket in a large set is six-point.
• Replacement policy. Sockets disappear. If a supplier does not sell individual replacement sockets, losing one 10 mm socket can force you to buy another full set. That is a total cost problem, not just a lost tool problem.

I have also learned to check the case layout before ordering multiples. Two identical-looking 163 piece socket sets can have different socket lists if one set was updated with more driver bits and fewer deep sockets. If I am buying for a crew that works on the same equipment, the difference matters.

5. How do you release locking pliers? Put the answer beside the tool

This is not exactly a purchase line, but every shop asks it eventually. How do you release locking pliers? The first time I saw someone try to pry the jaws open with a screwdriver, I added a short operating note to the next locking pliers order.

1. Squeeze the handles together slightly to take pressure off the over-center lock.
2. Press the release lever on the lower handle with your thumb.
3. If the lever will not move, turn the adjustment screw counter-clockwise about half a turn and try the release lever again.

The lever position can look different from one brand to the next, so I tell our teams to read the markings before forcing anything. The other lesson I learned is order-related: specify the jaw style when you buy locking pliers. Straight jaw, curved jaw, long nose, and locking C-clamp are not the same tool. If the request just says locking pliers, the product selector will choose what it thinks is close. Close is not a specification.

Last line: write the order so that a stranger can see the intent

The common mistake behind all five product types is assuming the person who receives your order sees the same picture you have in your head. They do not. They see a part number, a title, and maybe a photo. My final check is to read every line as though I am seeing it for the first time.

Is the finish stated? Is the thread size there? Is the socket set defined by drive size and measurement standard? Is the U bolt described by dimensions that can be checked with a ruler? If I cannot answer yes, I go back before I click submit. As of April 2026, this is still the part of my job that saves the most time. The price is easier to fix than the specification.