5 Pack Brass Fittings 5 Pack 1/2" X 1/2" Male NPT Connector Brass Compression Fitting For 1/2" OD Tube Compression Fittings Material: Brass For Corrosion Resistance, Ductility At High Temperatures, And Low Magnetic Permeability. GASHER 5PCS Brass Compression Tube Pipe Fitting Connector, 12mm Tube OD x 1/2" BSP Female Connector Features: Good Airtightness, Pressure Resistance, Not Easy To Trip., MAX. Find premium Tube Fittings designed for durability and performance, with wholesale pricing and availability at Hose Warehouse BASIC PARAMETERS: Product Name:12mm OD Brass Compression Union Tube Fitting Material: High Quality Brass FEATURES: 1., Made of solid brass, resistant to pressure, abrasion, corrosion, and durability 2., Good sealing performance, explosion-proof and pressure-resistant 3., Easy to operate, quick to open and close, and simple in structure 4., Applicable medium: suitable for most automotive, industrial, agricultural and other mechanical applications 5., Working pressure: 150psi;Temperature Range:-65℉~+250℉ PACKAGE INCLUDED: 5 x 12mm OD Brass Compression Union Tube Fitting NOTICE: Before using Compression Union Tube Fitting and other connecting products, wrap proper amount of teflon tape to prevent air leakage GASHER 5PCS Metals Brass Tube Fitting, Half-Union, 1/2 Flare x 1/2 Flare Male Pipe Fittings Working Principl: The working principle of a compression tube fitting involves thread interlocking, which compresses the ferrule.