What are the Common Types of Bolts?
Some common types of bolts are:
About Anchor Bolts
Anchor bolts are a general term for all post-anchoring components used to fix objects on concrete. The bolt head is usually placed in the concrete before it cures, or before the concrete is poured, leaving the threaded end exposed. The different anchoring mechanisms can be divided into expansion anchor bolts, reaming anchor bolts, bonding anchor bolts, concrete screws, shooting nails, etc.
- Expansion Anchor Bolts
Expansion anchor bolts use the relative movement of the cone and the expansion sheet (or expansion sleeve) to promote the expansion of the expansion sheet, generate expansion and extrusion force with the hole wall concrete, and generate anchor bolt pullout strength through shear and friction to achieve anchoring of the connected parts.
- Reaming type anchor Bolts
The reaming type anchor bolt is through the re-grooving and reaming of the concrete at the bottom of the borehole, and the mechanical interlock between the concrete bearing surface formed after reaming and the expansion head of the anchor bolt is used to realize the anchoring of the connected parts.
- Bonding Anchor Bolts
Bonded anchor bolts use a special chemical adhesive (anchor glue) to glue and fix the shaft and the inner threaded pipe in the drilling hole of the concrete substrate. The anchoring of the connected parts is realized through the bonding and locking function of the adhesive and the shaft and the adhesive and the concrete hole wall.
- concrete screw
The concrete screw is a hard and sharp knife-edge thread screw that is rolled and quenched by a special process. When installing, pre-drill a straight hole with a smaller diameter, then screw in the screw, and use the occlusal effect between the thread and the hole wall concrete to generate a pullout force to anchor the connected piece.
- shooting nails
Shooting nails are a type of gunpowder-powered, high-hardness steel nails, including screws, that are shot into concrete. Using its high temperature (900 ℃), the steel nails and the concrete are integrated by chemical fusion and clamping to realize the anchoring of the connected parts.
About Arbor bolts
An arbor bolt is a bolt with a permanent connection washer and reverses thread. Used in miter saws or other tools, it automatically tightens during use to prevent the blade from falling off.
About carriage bolts
Carriage bolts are bolts with a smooth round head and a square section. Carriage bolts are divided into large round head carriage bolts (corresponding to standard GB/T14 and DIN603) and small round head carriage bolts (corresponding to standard GB/T12-85) according to the head size. The carriage bolt consists of a head and a screw (a cylinder with an external thread), which needs to be matched with a nut to fasten and connect two parts through holes.
About Hex Bolts
Hex bolts have a hex head and a threaded body. The part directly under the head may or may not be threaded.
About J Bolt
J-Bolts are shaped like the letter J and are used for tie-downs. Only the non-bent part is threaded to allow the nut to be attached.
About Lag Bolts
Lag bolts are not true bolts, also known as lag screws.
About Rock bolt
Rock bolts are used in mines and also in engineering technology to reinforce the main body of slopes, tunnels, and dams. As a tension member that goes deep into the stratum, one end of the bolt is connected to the engineering structure, and the other end goes deep into the stratum.
The stud bolts have threads at both ends, and the screw in the middle is thick or thin. Generally used in mining machinery, bridges, automobiles, pendants, long-span steel structures, and large buildings.
U-bolts are bolts shaped like the letter U with threads on both ends that can be combined with a nut. A straight metal plate with two bolt holes is used with nuts to secure pipes or other round objects to U-bolts.
Sex bolt or Chicago Bolt
This is a bolt with male and female parts. General sex bolts can be used in luggage, leather goods, and clothing.
About hanger bolts
A bolt without a head, with threaded areas on both ends. Hanger bolts consist of delay screw threads on one end and machine screw threads on the other.
About elevator bolts
Also known as large flat head bolts.
Shoulder bolts are bolts with broad, smooth shoulders and small threaded ends that are used to create pivots or attachment points.
KENENG can produce and manufacture various types of bolts, screws, and other fasteners. Not only is there a large stock of standard sizes, but can also be customized according to specific drawings. If you would like to purchase fasteners in bulk, please feel free to contact us.