Sophia Delgado
In the United States, the length of a nail is designated by its penny size, written with a number and the abbreviation 'd' for penny. For example, a 16d nail is the same as a 16-penny nail. The larger the number, the longer the nail. A 16d nail is 3.5 inches long and is commonly thought of as a standard framing nail.
| Characteristics | Values |
|---|---|
| Length | 3.5 inches or 3 1/2 inches |
| Length in Penny | 16d |
| Common Usage | Framing walls |
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What You'll Learn
The abbreviation 'd' stands for penny
The letter "d" is used as an abbreviation for "penny" when describing nails. This dates back to Old England, where the term "penny" (plural pence) was used to refer to the price of a hundred nails. The size of the nails determined how many nails a buyer would receive for a specific amount. For example, one hundred 2-inch nails would cost six pennies, so these nails became known as six-penny nails, written as 6d.
The use of the letter "d" specifically stems from the old Roman "penny" called the denarius. The Romans used the term denarius (plural denarii) to represent the lowest value of the librae, solidi, and denarii (pounds, shillings, and pence) currency denominations. The word denarius is derived from the Latin 'deni', meaning "containing ten", as its value was originally 10 asses (plural of 'as', the smallest denomination issued at the time). In Roman times, 240 denarii were minted from one Roman libra (pound), so one pound (libra) contained 240 denarii.
Before England transitioned to a decimal system in 1971, a penny was worth 1/240 of an English pound sterling, and its symbol was "d", inherited from the Roman denarius. So, when you see "16d" or "18d" on a box of nails, it is the same as referring to "16 pennies" or "18 pennies" nails. This is why the "d" at the end of the nail size is used, indicating the cost of a set quantity of nails of that size in Old England.
As an example, a 16d nail is a standard framing nail that is 3.5 inches long, commonly used for deck framing.
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The 'd' is associated with the Roman coin, denarius
A 16d nail is a standard framing nail that is 3.5 inches long. The "d" in 16d is associated with the Roman coin, denarius.
The denarius was a silver coin that was first struck in 269 or 268 BC, five years before the First Punic War. It was the predecessor to the denarius, a Greek-styled silver coin with a didrachm weight that was struck in Neapolis and other Greek cities in southern Italy. The name "denarius" comes from "deni", which means "ten", as ten bronze asses (an aes grave with the image of Janus) made up a denarius. The denarius was introduced alongside a short-lived denomination called the victoriatus and contained an average of 4.5 grams or 1/72 of a Roman pound of silver.
The denarius was one of the most widely circulated coins of the ancient world and its legacy can be seen in the use of the abbreviation "d" for the British penny until 1971 and in France as the name of a coin, the denier. The denarius also survives in the common Arabic name for a currency unit, the dinar, which is still used in several modern Arab nations.
The denarius underwent slow debasement towards the end of the republican period, and the silver content of the coin gradually decreased over time. The coin had originally been between 95 and 98% fine silver, but this was reduced to 93.5% in 64-68 AD. Eventually, the denarius became a copper core plated with silver, and the coating was so thin that it sometimes rubbed off when it left the mint.
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A 16-penny nail is 3.5 inches long
The penny system is now obsolete in England, but nails are still designated in penny sizes in the United States and manufactured to Imperial dimensions in Canada. The number before the "d" indicates the length of the nail, with larger numbers corresponding to longer nails. So, a 16d nail is 3.5 inches long, while an 18d nail is 3.75 inches long.
When buying nails, it is important to note that the diameter of the nail can also vary based on the penny size, depending on the nail type. Nails under 1+1/4 inches, often called brads, are typically sold in small packages with only a length designation or with length and wire gauge designations. For example, a nail labelled as 1" 18 ga. indicates a length of 1 inch and a wire gauge of 18.
Retail boxes of nails will usually be marked with the penny size as well as the length in inches. However, it is always good to refer to a size conversion chart to be sure of the nail dimensions.
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A 16d nail is a standard framing nail
Framing nails are specifically designed for fastening lumber together, including wall framing, roof framing, and floor framing. They are one of the most common types of construction nails used in wood frame construction. The size of nails for framing depends on the specific application and the type of lumber used. It is important to choose the right size nail for the job, as a nail that is too long could result in the wood splitting, while a nail that is too short or thin might not hold the structure together properly.
There are two main types of nail guns used for framing: full round head framing nailers and clipped head framing nailers. Full round head framing nailers are often preferred in construction applications where building codes or project specifications require them. The full round head provides good holding power. Clipped head framing nailers, on the other hand, are lighter weight and can hold more nails in the magazine.
In addition to the size and type of nail, it is also important to consider the coating. In framing applications where the structure might be exposed to weather conditions, galvanized nails can help prevent rust and corrosion. There are two main types of galvanized coatings: hot-dip galvanized nails (HDG) and electro-galvanized nails (EG). HDG nails are dipped in molten zinc, providing a thick and durable coating that is suitable for exterior applications. EG nails, on the other hand, have a thinner coating that is suitable for interior applications or areas with less exposure to harsh weather conditions.
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The penny system is obsolete in England
The penny system, which includes the 16-penny nail, has become obsolete in England, with the country no longer using the coin or the related unit of measurement. The penny system has a long history, dating back to ancient Roman times, with the coin known as the "denarius" and valued at a labourer's daily wage. Over the centuries, the penny was adopted and adapted by various empires and nations, including the British, who translated it into a small silver Anglo-Saxon coin. As a former British colony, the United States also adopted the penny as part of its federal currency.
However, in recent times, the penny system has faced criticism and calls for its elimination in various countries, including the United States and Canada. One of the main arguments for eliminating the penny is its limited utility. Economist Greg Mankiw highlights that the penny is no longer widely accepted, with vending machines, parking meters, and toll booths often refusing it. Additionally, due to its low value, the penny is sometimes discarded by consumers, contributing to the high production costs for mints.
The debate around the penny's continued use also considers the potential impact on consumer prices and low-income households. Proponents of retaining the penny argue that eliminating it could lead to higher prices and negatively affect those with lower incomes. On the other hand, opponents suggest that eliminating the penny would streamline transactions without causing significant harm to consumers, businesses, or charities. The Canadian government's decision to eliminate the penny in 2012 provides a real-world example of this transition, as businesses began rounding cash transactions to the nearest five-cent increment.
While the penny system is no longer used in England, it is essential to clarify that the term "16-penny nail" is still commonly used in the construction industry, particularly in framing work. In this context, "16d" or "16-penny" refers to the length of the nail's shank, which is typically around 3.5 inches. This usage of "penny" is a holdover from the historical unit of measurement, but it is not directly related to the actual coin or its value.
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Frequently asked questions
16-penny nails are 3.5 inches long.
The "d" in 16d stands for penny, so 16d is the same as 16 pennies.
The penny system originated in England in the 15th century when the price for a hundred or long hundred (120) nails was indicated by penny size. The larger the nail, the higher the cost per long hundred.
