Western's Hand-Tight Nuts facilitate easy installation and are offered in brass or with plastic grips. Plastic Grips: Color-Coded Labels for Gas Service Brass Nuts: Machined to CGA Specs with Wrench Flats Hand-Tight Nuts: Require O-Ring Type Nipples CGA Fittings Over 3000 PSIG: No Soft Tips, Wrench Action Needed Color Silver Brand Name Western Enterprises Thread Type Hand-Tight Female Manufacturer Western Enterprises Material Type Brass Connector Type Nut Exterior Finish Natural Finish