Whilst we aim to provide the closest image to our products, The image may not be of the actual diameter, height, width, length, thread and colour you may require.
Always refer to the size guide/information in the description and additional specifications data provided below.
Pre-insulated ring terminals are electrical connectors designed for use in various wiring and electrical applications. These terminals are typically used to terminate or connect wires to electrical components such as switches, circuit breakers, relays, or other devices, and they provide electrical insulation to prevent short circuits or electrical hazards. Here are some key features and details about pre-insulated ring terminals:
Ring Shape: These terminals have a ring or circular shape, and they are designed to be crimped or soldered onto the end of a wire. The ring shape allows them to be securely attached to a screw or stud on an electrical component, providing a reliable and secure electrical connection.
Pre-Insulated: The "pre-insulated" part of the name means that these terminals come with insulation already attached. The insulation is typically made of plastic or nylon and serves to provide electrical insulation, prevent accidental contact with live wires, and protect against short circuits.
Wire Gauge Compatibility: Pre-insulated ring terminals are available in various sizes to accommodate different wire gauges or diameters. It's important to choose the right size of terminal to match the wire you are working with.
Colour Coding: The insulation on pre-insulated ring terminals is often colour-coded to help identify the wire size or the type of electrical circuit they are used in. This makes it easier to select the appropriate terminal for a specific application.
Crimping or Soldering: These terminals can be attached to wires using crimping tools or by soldering, depending on the specific application and preference.
Usage: Pre-insulated ring terminals are commonly used in electrical and electronic installations, including automotive wiring, industrial equipment, control panels, and household electrical wiring. They are particularly useful in situations where a secure and reliable electrical connection is needed.
When using pre-insulated ring terminals, it's essential to follow proper installation procedures and ensure that the terminals are securely attached to the wire and the electrical component. This helps maintain the integrity of the electrical connection and prevents potential safety hazards.
Technical Specification Material (Insulation): PVC Material (Terminal): Copper Material (Plating): Tin Maximum Temperature: 75°C Need Help? Have Questions? Contact UsFrank's Fasteners is a family run business, established late 2020.
We supply fasteners in a huge range of sizes and pack quantities, our range is constantly increasing as we strive to become one of the top fastener suppliers online.
Our website and eBay shop has been established to enable our many regular, as well as new, customers to purchase the fasteners they need without having to wait.
If you have a particular requirement or an item is currently out of stock, please feel free to contact us via eBay message, and we'll do all we can to help.
Payment, Delivery & ReturnsPayment
We accept payment via Credit card, Debit card, Apple Pay, Google Pay, and PayPal.
Delivery in the United Kingdom
We aim to dispatch orders on the same working day when ordered by 2.30pm via Royal Mail 24. You will have the option to upgrade delivery to next day Special Delivery by 1pm.
With 1st Class, Royal Mail aim to deliver in 1-2 working days. Please note that the delivery date given to you by eBay is an estimate only and delivery may take longer. If you have not received your order we kindly ask you to wait 7 working days as 99.5% of orders are received in this timeframe.
International Delivery
We dispatch orders via eBay's Global Shipping Programme where eBay calculate the price of postage and taxes to your country.
The Global Shipping Programme ships to the following countries; Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gibraltar, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Antigua and Barbuda, Aruba, Australia, Bahamas, Bahrain, Bangladesh, Barbados, Belize, Bermuda, Bolivia, Brazil, Brunei Darussalam, Cambodia, Canada, Cayman Islands, Chile, China, Colombia, Costa Rica, Dominica, Dominican Republic, Ecuador, Egypt, El Salvador, French Guiana, Grenada, Guadeloupe, Guatemala, Guernsey, Honduras, Hong Kong, Iceland, Indonesia, Israel, Jamaica, Japan, Jersey, Jordan, Kuwait, Liechtenstein, Macau, Malaysia, Maldives, Martinique, Mexico, Monaco, Montserrat, New Zealand, Nicaragua, Norway, Oman, Pakistan, Panama, Paraguay, Peru, Philippines, Qatar, Reunion, Saint Kitts and Nevis, Saint Lucia, Saudi Arabia, Singapore, South Africa, South Korea, Sri Lanka, Switzerland, Taiwan, Thailand, Trinidad and Tobago, Turks & Caicos Island, UAE, Ukraine, Uruguay, USA and Vietnam.
Returns
We offer a 30 day returns policy from the date of purchase. If for any reason you’ve changed your mind after your purchase or you require a different size product, we’re happy to work with you to return the item.
If you would like to return your order for a refund, you can open a return request. You'll need to send it back within 10 working days, using tracked postage. Adding tracking details to your return helps protect against delays or issues in the refund process.
How To MeasureThread Diameter
For most types of fasteners, the diameter is measured on the outside of the threads. (Note: US diameters under 1/4" are given as numbers (e.g #10) instead of inches, in order of increasing size. Information on sizes can be found using the THREAD TABLE tab.
To get an accurate size, a calliper should be used.
When measuring with a ruler, your eyes will not correctly measure the threads providing you with a wrong diameter. For example, you will see 2mm on a ruler but if measured in a caliper will be 2.8/2.9mm for a M3 size.
A easy way to confirm a size is by looking at what Allen Key size is used or diameter of head/across flats etc as most fasteners are made to a standard. If you need any help, please contact us.
Length
Fastener length is measured from where the material is assumed to be to the end of the fastener. Thus, Countersunk fasteners are measured overall and non-countersunk fasteners are measured from under the head.
Thread Count & Thread Pitch
Machine threaded fasteners specify a thread density in Threads Per Inch (US) or as a Thread Pitch in mm (Metric)
Getting the correct fasteners
Matching fasteners is important.
This 3/8" Hex Bolt has 16 Threads Per Inch which indicates it is a UNC Thread. You will need to find the matching 3/8" Nut with 16 TPI.
Thread TablePITCH (MM) | THREADS PER INCH (TPI) | |||||||||
Size | Coarse | Fine | Extra Fine | UNC | UNB | UNF | BSW | BSF | ||
M1.6 | - | #0 | 0.35 | - | - | - | - | 80 | - | - |
M2 | - | #1 | 0.4 | - | - | - | - | 72 | - | - |
- | - | #2 | - | - | - | 56 | - | 64 | - | - |
M2.5 | - | #3 | 0.45 | - | - | 48 | - | 56 | - | - |
- | - | #4 | - | - | - | 40 | - | 48 | - | - |
M3 | 1/8" | #5 | 0.5 | - | - | 40 | - | 44 | 40 | - |
M3.5 | - | #6 | 0.6 | - | - | 32 | - | 40 | - | - |
M4 | - | #8 | 0.7 | - | - | 32 | - | 36 | - | - |
M5 | 3/16" | #10 | 0.8 | - | - | 24 | - | 32 | 24 | 32 |
- | - | #12 | - | - | - | 24 | - | 28 | - | - |
M6 | 1/4" | - | 1 | - | - | 20 | - | 28 | 20 | 26 |
M8 | 5/16" | - | 1.25 | 1 | - | 18 | - | 24 | 18 | 22 |
M10 | 3/8" | - | 1.5 | 1.25 | 1 | 16 | - | 24 | 16 | 20 |
- | 7/16" | - | - | - | - | 14 | - | 20 | 14 | 18 |
M12 | 1/2" | - | 1.75 | 1.5 | 1.25 | 13 | - | 20 | 12 | 16 |
M14 | 9/16" | - | 2 | 1.5 | - | 12 | - | 18 | 12 | 16 |
M16 | 5/8" | - | 2 | 1.5 | - | 11 | - | 18 | 11 | 14 |
M18 | - | - | 2.5 | 1.5 | - | - | - | - | - | - |
M20 | 3/4" | - | 2.5 | 1.5 | - | 10 | - | 16 | 10 | 12 |
M22 | 7/8" | - | 2.5 | 1.5 | - | 9 | - | 14 | 9 | 11 |
M24 | 1" | - | 3 | 2 | - | 8 | 8 | 12(14) | 8 | 10 |
Stainless Steel
Stainless Steel offers good corrosion resistance, making it suitable for outdoor use and marine applications, but is more expensive than Zinc Plated.
Fasteners in grades A2 and A4, tend to be amongst the most popular ones across global markets. Grade A2, or as commonly known as 304 Stainless Steel is highly valued for its economical cost and delivering a good performance. Likewise, grade A4, or as known as 316 Stainless Steel is referred to as marine grade stainless steel. Due to its resistance to seawater and brine solutions, A4 screws work well in marine engineering applications.
Zinc Plated Steel
Zinc-plated steel is a type of low carbon steel that has been coated with a layer of zinc. This plating process is commonly used to provide several benefits to the steel, making it suitable for various applications.
It's important to note that while zinc plating does provide corrosion resistance, it may not be suitable for applications exposed to highly corrosive environments or extreme weather conditions. In such cases, more robust coatings, such as galvanization or stainless steel, may be necessary. Zinc-plated steel is a practical choice for indoor or dry conditions where moderate corrosion resistance and affordability are essential.
Brass & Bronze
Brass and Bronze are copper alloys with good corrosion resistance. More expensive than steel, these materials are typically used for decorative applications.
Alloy Steel
Alloy steel is a type of steel that contains additional alloying elements, such as chromium, molybdenum, nickel, or vanadium, in varying proportions to enhance specific properties. These alloying elements can significantly increase the hardness, strength, and other mechanical properties of the steel. Alloy steel typically offers limited corrosion resistance, and it is often treated with coatings to mitigate corrosion.
if corrosion resistance is a significant concern, other materials like stainless steel or coated alloys should be considered to ensure long-term durability in challenging environments.
Grade/Class & Fastener Strength
Fastener Grade (US) or Class (Metric) refers to the mechanical properties of the fastener material. Generally, a higher number indicated a stronger, more hardened (but also more brittle) fastener.
For more information regarding materials please visit our website.
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