Jetter Nozzle Threads: Hose Connections vs M6, M8 and M14 Inserts

The connection that attaches a nozzle to your hose and the threads on its replaceable jet inserts are different specifications. In KEG's catalog, M5, M6, M8 and M14 identify insert sizes on applicable models. They do not tell you whether that nozzle connects to a 1/4-, 3/8- or 1/2-inch hose fitting.

Buying a nozzle: check the inlet connection

The inlet is where the hose fitting attaches to the nozzle body. Confirm the nominal connection size and the actual thread specification on both parts. A size label alone does not establish that two fittings match. Use the manufacturer's documentation; do not infer the connection from the insert size or the nozzle's outside diameter.

Choose your connection size in the Nozzle Finder. For JPS 1/4- and 3/8-inch selections, enter the GPM you want to run. For 1/2-inch and larger selections, provide GPM and working PSI. Additional setup details may be needed for a configuration check.

Buying inserts: identify the exact nozzle and jet position

An insert is a separate jet component installed in a compatible nozzle body. Its thread size, seat, orifice and intended position must match the specified configuration. An M6 insert is not a hose adapter, and an M8 insert label is not a GPM rating.

• M6 example: the KEG Cleaning nozzle, part 0010 0004, has a 3/8-inch hose connection and eight rear M6 inserts in SBK-F26.
• M8 example: the KEG Cleaning nozzle, part 0010 0002, has a 3/4-inch hose connection and eight rear M8 inserts.
• M14 example: the KEG Royal, part 0010 0021, has a 1-inch hose connection and twelve rear M14 inserts.

These examples show why hose size and insert size need separate checks. They are not a complete interchangeability chart. Front and rear positions, model revisions and specialized components can differ.

Some premium nozzles are factory drilled

The 1/4- and 3/8-inch KEG Rambo models use factory-drilled jets. Do not order M6 replacement rear inserts for those models. Other KEG models use replaceable inserts; check the individual product rather than assuming every nozzle in a size collection has the same construction.

What to send when you need a replacement part

1. Nozzle name, part number and connection size.
2. A clear description of the jet position being serviced.
3. Your machine's GPM and working PSI, plus hose inside diameter and length for configuration work.
4. The existing insert markings, if readable, or photos for identification.

Follow the manufacturer's isolation, pressure-release and assembly instructions before inspecting or servicing the equipment. Tightening torque, sealant and insert settings are component-specific; a universal extra quarter-turn rule is not appropriate.

Choose the right buying route

Browse replacement inserts when servicing an insert-equipped nozzle, or compare complete nozzle kits when building a truck loadout. JPS can help identify the part before you order.

Technical reference: KEG SBK-F26 product catalog, including the Fluid Mechanics section and the relevant model specifications. Match parts to the exact nozzle and configuration.