Understanding The Standard Db25 Screw Size

The screw size for a DB25 connector depends on the manufacturer. Some use metric screws, while others use Imperial. For example, Apogee used metric nuts and screws for all their products until the Symphony I/O, which uses Imperial. If you're looking to purchase screws for a DB25 connector, you can try searching for them at third-party sites and hardware stores using the following information: Rosetta/16x metric DB25 Hex nuts, STANDOFF JACK SCREW 2.6mm, Symphony DB25 Imperial Hex nuts, and STANDOFF JACK SCREW 4-40 3/16”. You can also find DB25 screws on Amazon and eBay.

DB25 breakout cables

DB25 Breakout Board with Enclosure

Winford Engineering offers a DB25 breakout board with an enclosure, providing cost-effective and reliable cable termination. It features a terminal for each of the 25 lines, plus a shield, and is available with either spring terminals or screw terminals. The breakout board comes with a sturdy black plastic hood enclosure and a removable cover, allowing easy access to the connectors.

Amazon DB25 Breakout Connectors

Amazon offers a range of DB25 breakout connectors and cables, including:

• DB25 solderless connector with a male adapter and long bolts and nuts.
• Twinklebay DB25 breakout connector with a male adapter and a female adapter.
• DB25 breakout board solder-free male adapter with a 25-pin port adapter and long bolts and nuts.
• DB25 solderless breakout connector with a 5ft 24AWG replacement cable and a male adapter connector.
• CZH-LABS D'sub DB25 diagnostic test breakout board with a male-to-female connector.
• DB25 cable RS232 serial solderless breakout connector with a DB25 female connector and a 3ft bare wire end extension cable.
• Twinklebay DB25 breakout connector with a pack of 2 female adapters.
• Antrader DB25 breakout connector with a pack of 2 female adapters.
• Electronics-Salon DB25 D-SUB DIN rail mount interface module with male and female connectors.
• CERRXIAN DB25 breakout board with a DB25 female D-SUB connector and a screw wiring solderless terminal module.
• Twinklebay DB25 connector to wiring terminal breakout board with male and female adapters.
• DB25 male/female D-SUB DIN rail mount interface module with a D-sub terminal block breakout board.
• Twinklebay DB25 connector to wiring terminal breakout board with a male adapter and a case.
• DB25 breakout board solder-free female adapter with a 25-pin port adapter and long bolts and nuts.

Elite Core DB25 Analog D-Sub Cables & Breakout Snakes

Elite Core offers high-quality DB25 analog D-Sub cables and breakout snakes, featuring a 25-pin male D-sub connector and molded stress relief at the split. The breakout connectors can be easily taken apart for access or exchange.

Male-to-male DB25 adaptors

The adaptors come in various lengths, such as 3 feet, 6 feet, and 15 feet, to accommodate different connection requirements. They are typically foil-shielded to provide protection against EMI/RFI interference and ensure optimal performance. The connectors are often moulded for a secure and quick connection, and all 25 lines are wired straight through for ease of compatibility.

Some adaptors, like the Micro Connectors, Inc. RS-232 DB25 Male-to-Male Serial Cable, offer a length of 10 feet for more flexibility in connecting devices. This particular cable is also available for free and easy returns in-store or online within 90 days of purchase.

The DB25 Male-to-Male Gender Changer offered by Computer Cable Store is another option that allows users to change the gender of one end of a cable. It is designed to work with DB-style gender changers.

When choosing a male-to-male DB25 adaptor, it is important to ensure that all pins are properly connected, including the shields, to avoid any connectivity issues.

Metric vs. Imperial screws

When it comes to DB25 screws, it's important to understand the difference between Metric and Imperial screw sizes. The choice between the two systems often depends on personal preference or the target market, as some countries predominantly use the Metric system, while others use the Imperial system.

The Metric system measures both the diameter and length of screws in millimetres. This system is advantageous when a wide variety of sizes within a small range is needed, as it allows for easier scaling compared to the Imperial system. Metric bolts are also commonly used by international manufacturers, so American manufacturers adopt this system when selling their products abroad.

On the other hand, the Imperial system, also known as the American Standard, measures the diameter of screws by their gauge, with larger numbers indicating larger diameters. The length of Imperial screws is denoted in inches. The two basic types of standard Imperial bolts are the Unified National fine thread bolt and the Unified National coarse thread bolt.

In the context of DB25 screws, it's been observed that some manufacturers use "standard" threads, referring to the Imperial system, while others use Metric. This variation can pose challenges when assembling parts, as seen in a user's experience with Planet Waves DB25 breakout cables, where they encountered issues with cross-threading and broken parts due to the mix of Metric and Imperial screws.

To avoid such issues, it's essential to identify the correct screw type for your specific application. For instance, if you're working with a DB25 connection and need to determine the thread size, you may find that some manufacturers use Imperial screws, such as #4-40 D Sub Jack Screws, while others use Metric screws, typically sized as M3. Ensuring that you use the correct screw type will prevent compatibility issues and potential damage to your equipment.

Thumb screws

When purchasing thumb screws for DB25 connectors, it is important to ensure that you are getting the correct thread size. Some manufacturers use standard or imperial threads, while others use metric threads. The thread size can be measured in inches or millimetres, so it is essential to verify the measurements before making a purchase.

In addition to the standard thumb screws, some retailers also offer thumb screws with unique features, such as full metal construction or Phillips head screws. It is worth comparing prices and reading reviews from other customers before making a purchase to ensure you are getting a product that meets your specific needs and expectations.

D-Type connector nuts

D-Type or D-Sub connectors are used for many applications, including for computer video and serial data links. They were first developed in 1952 by Cannon, now part of ITT, and are still incorporated into many new electronic circuit designs.

D-Type connectors are commonly used to secure panel-mounted connectors. They are typically secured to the panel using nuts that have an additional thread that allows the mating connector to be secured to it to prevent it from working loose. This is particularly useful in applications where there may be some vibration or other reasons for the connections to become loose.

The hexagonal standoffs (4-40 bolts) on both sides of each connector have a threaded stud fastening the connectors to the metal panel. They also have threaded sockets to receive jackscrews on the cable shell, holding the plug and socket together. The jackscrews are designated with the Unified Thread Standard and are usually #4-40 UNC.

The D-Type connector was originally termed a sub-miniature connector, and as a result, they were referred to as the D sub-miniature connectors, or D-Sub for short. While these connectors were small when they were first introduced, they can no longer be considered true sub-miniature connectors compared to modern technology.

Today, smaller connectors have been developed from the basic D-Type concept to accommodate the need for new ranges of much smaller connectors to be used with today's electronic circuit designs. These include the Micro-D and Nano-D sub-connectors, which are about half the length of a standard D-Sub and a quarter of its length, respectively.

Frequently asked questions