Codes on a syringe indicate the type of needle (fixed or removable); the point style or shape of the needle; and other information. For convenience, we usually also list the manufacturer’s part number in the same table as the syringe.
From cemented to removable needles, and from PTFE luer lock to special syringe fittings, syringe barrel terminations create the interface between a syringe and its mating connection. For your reference, we describe the most common Hamilton/SGE terminations below.
 | N, Cemented Needle / F, Fixed: Needle cemented into the glass syringe barrel at a point corresponding to the zero graduation mark. Not autoclavable. |
 | KH, Knurled Hub / R, Removable: Used on 7000 Series Hamilton syringes, exclusively. Knurled hub enables 6000 psig maximum injection pressures and the attachment of a spacer for repeatable-depth injections. Autoclavable when disassembled. |
 | RN, Removable Needle / R, Removable: Needle seats precisely to the zero graduation mark of the syringe. Allows the use of different specification needles on the same syringe barrel. Autoclavable when disassembled. |
 | TLL, PTFE Luer Lock / LL, Luer Lock / LT, Luer Tip: Male luer taper with nickel-plated brass hub accepts and locks into place luer hub needles and connectors. Autoclavable when disassembled. |
