Common specifications and labeling folding Edit this paragraph A: metric screws B: US regulatory screw C: inch screws A: Metric Machine Screw: MetricEx: M3 x 6 - PPB: M3 machine screws, 6mm long stainless steel wood screws, stainless steel wood cross Yantai Screw, round flat head, black-plated .Finish Code: Exterior handling specifications Head Code: head shape Screw Thread Code Type Drive Code: head sectional groove, characterized in Type Length Code: Screw Length (mm) A-1: ??Thread Code: The screws metric screws directly to the screw outer diameter of the screw marked models, such as M3 namely an outer diameter of 3.00mm .; M4 screws screw outer diameter that is 4.00mm.Metric Thread Size x Pitch: Note: Metric screw at the rear of the screw type, sometimes marked screws from the teeth as M3x0.5, M4x0.70, M5x0.8, M6x1 but because standards are not usually mention c Phil-Slot:..... word / Phillips d Hex Socket: e within Hexagon . One Way: unidirectional (only locked into, not exit) A-4: Head Code / head shape .a Flat:. flat head (after lock into the top flush with the work piece) b Oval:. salad head , O head, countersunk head c Round:. Round d Pan:. round flat head stainless steel nuts. Screws 316L, 316 L stainless steel wood screws screw Jining, 316 bolts e Truss:. Great circle flat head, stainless steel screws, stainless steel screws, f Hex:. Hex head .A-5: Finish Code / exterior treatment metric self-tapping screws: to name behind the label direct Tapping Type.Ex: M3 x 6 -PPB, Tapping Type: M3 self-tapping screws Liaocheng stainless steel wood screws, 6mm long, cross, round flat head, black-plated products generally do not or label, then judge. For the Sheet Metal or plastic parts use *** teeth to the number of threads per inch *** Heze stainless steel wood screws |. stainless steel wood screws | Jinan Road ground is provided by Jinan Daoqin Trading Company. Jinan Daoqin Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) strong, credible, in Jinan, Shandong hardware accessories industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinan Road ground into the brilliant and you work for a better future!