Standard number Standard name Equivalent to the use of the international standard ISO label GB8015.1-87 Aluminium and aluminium alloys Anodic oxide film thickness test method Gravimetric method 2016-1982 GB8015.2-87 Aluminium and aluminium alloys Anodic oxide film thickness test method Microscopy 2128-1976 GB8752-88 Aluminium and aluminium alloys - Anodized thin anodized film - Test for continuity - Copper sulfate test 2085-1976 GB8753-88 Aluminium and aluminium alloys - Anodized anodic oxide film - Evaluation of loss of adsorption capacity after sealing - Acid treatment After the stain spot test 2143-1981 GB8754-88 Aluminum and aluminum alloy anodizing Application of breakdown potential test method to check the insulation 2376-1972 GB11109-89 Aluminum and aluminum alloys Anodization term 7583-1986 GB11110-89 Aluminium and aluminum alloy anode Method for the determination of the sealing quality of oxidized anodic oxide films. Admittance method 2931-1983 GB/T12967.1-91 Anodizing of aluminium and aluminium alloys Using a jet mill test apparatus for the determination of the average wear resistance of anodic oxide films 8252-1987 GB/T12967. 2-91 ANODIC OXIDATION OF ALUMINUM AND ALUMINIUM ALLOYS WHEEL Abrasion Test Apparatus for Determining Abrasion Resistance and Wear Coefficient of Anodized Films 8251-1987 GB/T12967.3-91 Cu Addition of Anodic Oxide Films on Aluminum and Its Alloys Acetic acid salt spray test (CASS test) 3770-1976 GB/T12967.4-91 Anodic oxidation of aluminium and its alloys - Determination of the resistance to ultraviolet light of coloured anodic oxidation coatings 6581-1980 GB/T 12967.5-91 Aluminium and aluminium alloys Anodic Oxidation Evaluation of Anodic Film Cracking Resistance by Deformation 3211-1977 GB11250.1-89 Determination of Composite Metal Cladding Thickness - Metallographic Method GB 11250.2-89 Determination of Composite Metal Cladding Thickness - X Fluorescence Method GB 11250.3- 89 Determination of composite metal coating thickness - Volumetric method GB11250.4-89 Determination of composite metal coating thickness - gravimetric method GB/T13322-91 Metal coating of low hydrogen embrittlement and cadmium titanium plating GB/T13346-92 Metal cover steel Upper cadmium plating 2082-1986 JB/T5067-91 Steel parts powder mechanical galvanizing JB/T5068-91 Metal coating thickness measurement X-ray spectrometry 3497
Carbon Steel Screw
Screws are threaded fasteners that create permanent or temporary assemblies. They are inserted and removed by turning in one direction or another. Wood screws, floor screws, and sheet metal screws have flat heads that sit flush when holding material together. Machine screws fasten metal to metal and are inserted into a prethreaded hole or mated with a nut. Thread-cutting screws are self-tapping screws that cut away and remove the surrounding material to create a tapped hole. Deck screws resist rust and corrosion to hold outdoor decking materials together. Drywall screws have fine tips, coarse threads, and tapered bugle heads to penetrate drywall and grip wood without damaging material. Hex-head bolts, cap screws, and lag screws are driven with wrenches rather than screwdrivers or drill bits. Captive panel screws and thumb screws can be tightened and loosened without tools on parts that are frequently removed such as access panels. Screw caps can help to cover screw heads for both safety and aesthetic purp
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