This is a CGA-170 to 1/8" MNPT stainless steel fitting with included Teflon washer. Nipple length is 1.25 in. This size CGA fitting is typically used to connect regulators to small compressed gas cylinders (lecture bottles) in labs working with small quantities of gases or specialty gases. This CGA-170 fitting, PN: SEQ1702SS, is rated for use with non-corrosive gases in small cylinders up to 3000 psig. The Teflon washer is not typically reuseable. See part number P1012968 for replacement washers.

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 gasketd 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.