This is a replacement Teflon sealing washer for a CGA-110 gas regulator inlet fitting. The CGA 110 fitting has a gasketed connection that requires a flat washer to make the seal. The washer is typically not resueable, so its good to keep a few spares on hand.

Dimensions:

• Inside Diameter: 0.320 in.
• Outside Diameter: 0.528 in.
• Thickness: 0.060 in.

See part number P1010961 for the CGA-110 to 1/4" Male NPT fitting, short, made of stainless steel.

CGA fittings are standardized and authorized for the attachment of regulators and transfer lines to gas cylinders filled with specific gases at defined maximum pressures. The three digit number, CGA (XXX), corresponds to the specific gases for which that fitting is tailored (see the downloads).

Connections to cylinders should never be forced. CGA fittings mated between regulator and cylinder never use pipe dope or PTFE tape. CGA connections use either a bullet-nose or gasketed seal. The bullet nose connection has a metal-to-metal contact and seal. Some bullet-nose connections have an o-ring to help improve the seal and to allow a connection to be made without a wrench (hand-tight connections). A gasketed connection requires a flat washer to make the seal. CGA fittings are available in several materials including brass, stainless steel, nickel or chrome-plated brass, and Monel. The CGA fitting material to use depends on the gas and cylinder pressure.