1-Way Shut-off: one half of the coupler is valved, usually the coupler, to
prevent flow from one direction.
2-Way Shut-off: valves on both halves of the fitting, used to prevent any
Aluminum: A common material of choice because of its low cost
Barb, Standard: Hose connector used with a crimping fitting
Barb, Push-on: Hose connector used with push-on hose that does not need a crimp
fitting or can be used in standard hose with a crimp fitting
Ball Valve: A valve that seals when a ball (internally) is rotated 90º. Also see Gate
Bend Radius: The radius, in inches, of a circle that a hose can make and still
work without fear of kinking or damage.
Brass: One of the most common materials used for fittings; Brass is
self-lubricating, resists corrosion and absorbs shock well.
Coupling: A pair of fittings (one male and one female) that join together to
form a union to connect two things together.
Coupler: Female half of the fitting which male (plug) locks into.
Double valved: see 2-way shut-off
Dust Cap: Cam and Grove fitting the fits over a male adapter to block line
Dust Plug: Cam and Groove fitting that fits inside a coupler to block line
Gate Valve: A valve that lowers a block (internally) through the pipe to stop
flow. This is the old style of valve being phased out due to failures in the
seal (the seat that stops flow) or packing (material that stops leaks from
around stem) failure. Almost all valves are changing to ball valves.
FPT: See Female NPT
Female NPT: Female National Pipe Thread
Handles: Locking clips on Cam and Groove fittings
Hose Jacket(ing): The outer cover that reinforces and protects the inner
workings of the hose.
Hose Shank: Adapter to attach Cam and Groove fittings to hose
Locking, External: Coupler locks by rotating the slide
Locking, Internal: Coupler locks under pressure and will not release until line
Locking Pin: Pins used to hold handles in place on Cam and Groove fittings
Locking Clip: Clip installed behind slider to lock standard QD’s closed. Clip
needs to be manually removed before fitting will disengage.
Male Adapter: Half of Cam and Groove that inserts into the coupler (also see
Mold Connector: See Coupling
Mold Disconnect: See Coupling
Nipple: See Plug
Non-valved: No internal mechanism to stem the flow of material
NPT: Male National Pipe Thread
Plug: Male half of the fitting which locks into the female (coupler) half.
Push-on Barb: A barbed fitting that does not need a clamp if used with push on
Push-to-connect Fittings: A quick disconnect fitting for smaller tubing. Press
the hose into the fitting to lock it. Slide the ring and pull the hose to
disconnect. A.k.a. Robot Fittings.
Quick Disconnect: See Coupling
Quick Change: See Coupling
Robot Fitting: see push-to-connect
SAE Thread: Non-tapering threads
Safety: The hose burst pressure relative divided by the working pressure. Water
hoses use a safety factor of 5 – meaning the burst pressure is 5 times the
working pressure. Steam hose uses 10 to 1.
Series: Denotes which fittings will work in unison. Different series fittings
will not work together.
Series-ARO 210: used for air
Series-20/30: used for air mostly, some water
Series-200,300 and 500: used mostly for water and anti-freeze
Series-60: used for oil
Series-ST: used for high-flow water
Standard Barb: One that needs a clamp to secure it within the hose
Stainless Steel: A less common fitting because of cost, but needed when
sterilization must be maintained.
Steel: One material used to make fittings, used because of its wear resistance
and ability to resist high heat.
Stop Plug: Fitting, installed in coupler, that caps the line if it is not valved.
Valved: Internal mechanism to stem the flow of material when disconnected
Waterline Extension Plug: A series 200/300/500 plug (male) that come in various
NPT sizes allowing quick disconnects to be connected to recessions.