BD Insulin Syringes U40 31G 6mm (BD Ultra-Fine Insulin Syringe)

Last Updated on 10/07/2026 ✔ Medically Reviewed by Dr. Arjun Srivastav

What Are BD Insulin Syringes U40 31G 6mm?

BD Insulin Syringes U40 31G 6mm are syringes made for measuring and administering U-40 insulin. The product combines a U-40 scale with a 31G needle that measures 6 mm in length, so each part of the name tells you something about the syringe.

The U-40 marking identifies the insulin concentration the syringe is calibrated for. The 31G refers to the thickness of the needle, while 6 mm describes how long the needle is. Checking these details before use is important because insulin syringes are available in different sizes and calibrations.

The BD Ultra-Fine™ name is used for BD’s insulin syringe range. Before using this product, check the information on the packaging and make sure the syringe matches the insulin and instructions provided by your healthcare professional.

BD Insulin Syringes U40 31G 6mm Specifications

Knowing the basic specifications makes it easier to confirm that you have the right syringe for your prescribed insulin. The main details to check are the insulin scale, needle gauge, needle length, syringe capacity, and pack size.

The 31G × 6 mm needle describes the physical size of the needle, while the U-40 marking relates to the insulin concentration for which the syringe is calibrated. Always check the actual BD Insulin Syringes U40 31G 6mm product label for the capacity and pack configuration before ordering or using the syringes.

What Do U40, 31G, and 6mm Mean?

The numbers and letters in the product name are not just model details. They tell you about the syringe calibration and the needle itself, so it is worth knowing what each one means.

What Does U40 Mean?

U-40 refers to the insulin concentration that the syringe is calibrated to measure. If you have been prescribed U-40 insulin, the syringe scale should correspond to that concentration. Using the wrong syringe calibration can result in an incorrect amount of insulin being measured, so do not switch between U-40 and U-100 syringes without professional advice.

What Does 31G Mean?

31G is the needle gauge, which describes the needle’s thickness. Gauge numbers are used to identify needle diameter, with higher gauge numbers generally indicating a finer needle.

What Does 6mm Mean?

6 mm is the length of the needle from the base to its tip. Needle length is one of the factors considered when selecting an insulin syringe, along with the insulin concentration and the amount prescribed.

If you are unsure which syringe specification is right for your insulin, check with your doctor, pharmacist, or diabetes educator rather than choosing based on appearance alone.

What Are BD Ultra-Fine™ Insulin Syringes Used For?

BD Ultra-Fine™ insulin syringes are used to draw up and administer insulin as prescribed. The syringe is designed to help measure the required amount from an insulin vial before injection.

For this particular product, the U-40 marking is an important detail because the syringe scale is intended to correspond with U-40 insulin. Before drawing up insulin, check the concentration shown on the insulin label and make sure it matches the syringe you are using.

The syringe should be used according to the instructions provided with the product and the technique recommended by your healthcare professional. If you are uncertain about the correct syringe, insulin concentration, or prescribed amount, speak with your doctor, pharmacist, or diabetes educator before using it.

Choosing the Right Insulin Syringe

Choosing an insulin syringe is not simply about picking the smallest needle or the size that looks most comfortable. The syringe needs to match the insulin you have been prescribed and the amount you need to measure.

Before using or ordering a syringe, check these points:

• Insulin concentration: Confirm whether your insulin is U-40 or another concentration and use the corresponding syringe scale.
• Dose required: The syringe should have enough capacity to measure the prescribed amount clearly.
• Needle specification: Needle length and gauge are selected based on the product, injection technique and individual needs.
• Product instructions: Check the packaging to confirm that the syringe is suitable for your intended use.

If you have been given a particular syringe specification by your doctor, pharmacist or diabetes educator, follow that recommendation rather than changing to another size on your own.

For this BD Insulin Syringes U40 31G 6mm product, the most important step is to confirm that the U-40 syringe scale corresponds with the insulin you are using. If you are unsure, ask a healthcare provider before your next injection.

How to Use BD Insulin Syringes U40 31G 6mm Safely

Before using BD Insulin Syringes U40 31G 6mm, take a moment to check the insulin and the syringe you have in front of you. The insulin label should match the syringe you have been told to use, and the syringe should be clean and undamaged.

Wash your hands before preparing the injection. Follow the injection method shown to you by your doctor, pharmacist, or diabetes educator, as the correct technique can depend on the type of insulin and your individual treatment.

Once the injection is finished, the used syringe should not be left on a bench or put loose into the rubbish. Place it straight into a suitable sharps container and keep the container somewhere children and other household members cannot reach.

A few simple habits are worth keeping in mind:

• Never share your BD Insulin Syringes U40 31G 6mm with someone else.
• Check the syringe before use and do not use one that is damaged or has been opened or contaminated.
• Use a new syringe according to the instructions supplied with the product and your healthcare professional’s advice.
• If you are unsure about preparing or giving your insulin, ask a doctor to show you the correct technique rather than guessing.

Single-Use, Storage, and Disposal

BD Insulin Syringes U40 31G 6mm should be kept clean and protected until they are needed. Store unused syringes in their original packaging and follow any storage instructions supplied with the product.

Keep these points in mind:

• Keep unused syringes protected: Store them in a clean, dry place away from excessive heat and moisture.
• Check the packaging: Do not use a syringe if its packaging is torn, damaged, or appears contaminated.
• Do not leave used syringes lying around: Once an injection is finished, place the used syringe somewhere safe until it can be disposed of properly.
• Use a sharps container: Put used syringes directly into an appropriate sharps disposal container. Do not place loose needles or syringes in household recycling or rubbish.
• Dispose of the container properly: When the sharps container is full, follow the disposal arrangements available in your local area.

If the BD Insulin Syringes U40 31G 6mm product packaging provides different storage or disposal instructions, follow those instructions or ask your pharmacist for advice.

Choosing the right insulin syringe comes down to making sure the product matches your insulin and prescribed dose. With BD Insulin Syringes U40 31G 6mm, check the product details and packaging before use, particularly if you are replacing an older syringe or switching between products.

If you are looking to purchase this BD Insulin Syringes U40 31G 6mm through AustraliaRXMeds, review the listed product information carefully and speak with a pharmacist or other healthcare professional if you are unsure whether the product is suitable for your treatment.