Metal hub (nickel plated brass) needles can be used with TLL syringes and LT or TLL connectors. The needless are 304 stainless steel (sst.). Standard needle length is 2" / 51 mm. Metal hub (N) needles are available in convenient six packs. Custom needle lengths and point styles are available.
Kel-F hub (KF) needles can be used with Luer Tip (LT) and PTFE Luer Lock (TLL) syringes and connectors. Standard needle length is 2" / 51 mm. Kel-F hub (KF) needles are available in convenient six packs. Custom lengths and point styles are available.
When selecting a needle gauge it is important to keep in mind the volume of the syringe and the dead volume of the needle. For example, it will be very difficult to prime a 10 µL syringe if the dead volume in the needle is greater than 10 µL. Refer to the gauge index to choose a needle gauge with an appropriate µL/inch before selecting a needle. Select the minimum length that allows you to carry out your application comfortably.
Note: The ‘s’ on a 22s needle represents a smaller I.D. (inner diameter) for the needle and a thicker needle wall for better durability. For example, a 26 gauge needle has an O.D. (outer diameter) of 0.46 mm and an I.D. of 0.26 mm while the 26s gauge needle has an O.D. of 0.47 mm and an I.D. of 0.13 mm. The 26s has half the I.D. of the 26 gauge needle. Also, the difference in the wall thickness nearly doubles with 26s gauge having a thickness of 0.18 mm while the 26 gauge is only 0.10 mm.
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Several different needle point styles are offered on Hamilton syringe and needle products depending on the application. The correct point style varies depending on the intended application. Below are a few examples of common applications.
Animal Injections: Point Style 4 with a 45º angle allows for the most accurate targeting of a specific biological structure.
Manual HPLC Injections: Most manual injection valves are designed to be used with a 22 gauge Point Style 3 needle.
Manual GC Injections: Historically a Point Style 2 was required to achieve efficient septum penetration with minimized coring. With Hamilton’s new line of GC septa there is evidence that indicates the Point Style AS will consistently extend septa life by as much as 10-fold.
Drawing Sample: Any point style will efficiently draw a sample, but when it is important to get the last drop out of a vial use Point Style 3 or AS to reach all the way to the bottom.
Note: Syringes and needles manufactured by Hamilton Company are intended for scientific research and laboratory use only and are not intended for human in vivo use.
Point Style 2
Sharp, beveled, curved, non-coring needle point recommended for septum penetration.
Available gauges: 33-10.
Point Style 3
Blunt needle point for use with HPLC injection valves and for sample pipetting.
Available gauges: 33-10.
Point Style 4
Standard 12° beveled needle point is recommended for life science applications.
Available gauges: 33-10. Special point styles such as 30°, 45°, or any other angle are available upon request.
Point Style 5
Conical needle with side port for penetration of septa, thin-gauged vinyls and plastics without coring.
Available gauges: 26-10.
Point Style AS
Special conical style needle point used on autosampler syringes the non-coring needle point is recommended for septum penetration.
Available gauges: 26 & 22.
Hamilton Company does not manufacture glass needles. We manufacture a unique compression fitting that enables the end of a standard removable needle syringe to create a robust seal with standard 1 mm glass capillary tubing. There are no products in this category but ordering information for the compression fitting can be found at the “Compression Fitting” link on the Download and Links tab.