Fasteners Classification and Characteristics
There are many kinds of fasteners. According to their names, fastener can be divided into seven basic categories: bolts, screws, nuts, rivets, pins, welding nails and washers. Bolts include external hexagonal bolts, flange bolts, double-headed bolts, anchor bolts, U-shaped bolts, live bolts, carriage bolts, etc. Nuts include hexagonal nuts, cap nuts, slotted nuts, flange nuts, anti-loosening nuts, round nuts, butterfly nuts and various special-shaped nuts. The screw includes the inner hexagonal screw, the machine screw, the suspension ring screw and the half-sinking head cross internal six-screw. Washers include flat washers, spring washers, anti-loosening washers, back washers, bowl washers, etc. Rivets include pull rivets, solid rivets, hollow rivets, semi-hollow rivets, etc.
According to the different processing technology, it can be divided into cold heading fastener, hot punching fastener, stamping fastener, castings and so on.
According to the different thread, it can be divided into standard pitch fastener, fine tooth fastener, ultra-fine tooth fastener, trapezoidal fastener, reverse thread fastener and so on.
According to the different surface treatment methods, it can be divided into galvanized fastener, hot galvanized fasteners, nickel-plated fastener, chromium-plated fastener, oxidized blackening, powder galvanized fasteners, Dacromet fastener and other series of products.
Grade 8.8 Hex Bolt For Steel Structure Materials: Alloy steel: 40Cr/42CrMo/B7/35CrMo Other available standards: ASTM A325,ASTM A490 GRADE: 8.8s/10.9s SIZE RANGE(Inch): Dia.: 1/2~1 1/2 Length:1 1/4~12 SIZE RANGE(Metric) Dia.: M12~M36 Length:40mm~300mm Normal finish: Black oxide, Dacromet, phosphating, Hot dip galvanized,etc. Head Marking: accept customer Certification: CE,SGS,ISO 9001 From raw materials to end product delivery, it […]
Black Heavy Bolt A325 Size: M12-M36 Standard: A325 Finish: Plain, Black, zinc-plated, HDG Black Heavy Bolt A325 Material: carbon steel Packing: Standard export packing or According to customer’s requirement Finishing: Coloured zinc-plated(galvanized,can be white,blue,yellow,green), Hot dip galvanized(HDG), Nickel-plated,Chrome-plated, Tin-plated, Dacromet, Passivation, Dacroblack, QPQ,Polished,Matt. We have been engaged in the fasteners for many years. Our company […]