page_title: Air-line fitting
hierarchical_section_title: Air-line fitting
caption_attribution_description: 1&#8260;4 in (6.35 mm) Quick-Connect studs
context_section_description: This article is a compendium of hand-operable air-line fittings, typically of quick-disconnect type, used for pneumatics and other compressed air purposes including breathable air (a subset of breathing gases).
caption: Three quick connect fittings.