China Manufacturing Wholesale Price Grade 8.8 Bolt and Nut Screw Washer DIN931 DIN933 Metric Stainless Steel Galvanized Hex Bolt

Length is measured from the point at which the head sits flat with the surface, to the tip of the threads. Hex, pan, truss, button, socket cap, and round head screws are measured from right under the head to the end of the threads. Flat head screws are measured from the top of the head to the tip of the threads.

Hex bolts, or hex cap screws, are large bolts with a six-sided head (hexagonal) used to fasten wood to wood, or metal to wood.

Use a hammer to tap against the hex-key wrench in extreme cases. Pour a few drops of household oil or spray a shot of aerosol lubricant on screw heads that do not come loose with the additional tools. Allow 20 minutes for the lubricant to work in between the threads before attempting removal.

The application scope of bolts and nuts includes: automotive,construction,electronic products, mechanical products, digital products, electrical equipment, electromechanical mechanical products. Bolts and nuts are also useful in ships, vehicles, water conservancy projects, and even chemical experiments. Anyway, bolts are used in many places. Precision bolts used on special digital products. Miniature bolts for DVDs, cameras, glasses, watches, electronics, etc .; general bolts for TVs, electrical products, musical instruments, furniture, etc .; for engineering, construction, and bridges, large bolts and nuts are used; transportation appliances, aircraft, trams, automobiles The equivalent is the combination of large and small bolts.