Table of Contents
What is a Hollo-Bolt?
The Lindapter Hollo-Bolt is a patented method of securing to square, rectangular or circular hollow section steel, or to conventional steelwork where access is available from one side only.
Are Hollo bolts removable?
The Hollo-Bolt Flush Fit however cannot be removed once it is installed.
What is a box bolt?
Box Bolt – is an expansion bolt for structural steel connections to hollow section steel or where there is a “blind connection,” where you only have access to one side of the connection.
How do you install Hollo bolts?
In comparison to alternative methods such as welding, a Hollo-Bolt connection can be quickly installed by simply inserting the fastener into pre-drilled holes and tightening with a torque wrench.
What are hollow bolts called?
Also known as jam set screws, these lock other screws in place, hold pins, and adjust spring tension.
How do expansion bolts work?
Expansion bolts can be used to secure heavy objects to walls or floors. By tightening the bolt, the nut on the opposite end pulls into the shell, expanding it outward and wedging it inside the hole in the wall or floor.
What is an expansion anchor?
Expansion anchors can be used to describe the majority of concrete and masonry anchors. Anchors of this type are designed with an expansion mechanism that compresses against the base material. Compression anchors may also be pre-expanded and/or used in conjunction with a drive nail.
What are blind bolts used for?
As you would expect from the name, you can use a blind bolt to create a fastening from one side through pre-drilled holes without having to access the other side to complete the lock. A blind bolt consists of three things, a steel pin, a collar and a sleeve.
What is an Ajax bolt?
Ajax Engineered Fasteners Achieves Certification for Oneside Fasteners. These fasteners consist of four components; bolt, split washer, solid washer and the nut, and are intended for use where you cannot access both sides of the fastener to tighten it.
Is there a hollow screw?
The types of hollow screws that are sold by Metric & Multistandard are designed to be used with hydraulic tubing. They have a male end with metric pipe thread that is designed to be screwed into a machine or bulkhead. Metric hollow screws come in two types, one with a long thread and one with a short thread.
What is a vented screw?
Vented Screws are also known as Vacuum Screws, Ventilation Screws, or Hollow Screws. A vented screw features a hollow core (has a hole drilled through it) and are specially designed to allow the release of gases, contaminants, and pressure through the fastener.
What is the difference between expansion bolt and anchor bolt?
The anchor bolt allows a smooth screw to be stressed by mechanical locking force; The expansion bolt mainly generates friction by pressing, and the force is applied.
Can you remove Dynabolts?
Dynabolts are designed for concrete and brick and are not designed to be removed. In cases like this, you will have to cut the bolt flush to the surface of the brick or concrete and may be able to punch the anchor in just enough to repair the surface.
Is an expansion anchor the same as a wedge anchor?
Wedge Anchor – This anchor utilizes an expansion clip at the working end and provides excellent consistent holding values of any type of expansion anchor in solid concrete. It is manufactured in 9 different diameters and in many lengths to meet most concrete fastening requirements.
How many types of anchor bolts are there?
There are four types of anchor bolts such as double-end rods with plate, L-shaped, headed, and swedge type. Every type of anchor bolt is available with different sizes, uses, and advantages.
What is a blind stud?
Blind threaded studs, sometimes referred to as pull up studs, provide strong external threads on metal surfaces in blind applications. These fasteners are easy to install using spin/spin tooling.
What is a blind thread?
Blind Threaded Insert: The generic term for a threaded fastener capable of being installed into a panel with access to one side only, hence the use of the word blind.
What are HD bolts?
The Heavy Duty Bolt (HD) is a shorter blind fixing which provides improved performance when the shear plane of the materials being fixed falls across the legs of a standard Blind Bolt. A HD Bolt is the perfect solution when heavy weight steel sections need to be fixed in place.
How much weight can a M12 bolt hold?
For example, a grade 12.9 bolt will not snap until every square millimetre of the bolt cross section is carrying a load of at least 120 kg. Similarly a grade 8.8 bolt will not snap until it is carrying a load of 80kg per square millimetre. Size Pitch (std) Pitch (fine) M12 1.75 1.5 M16 2.0 1.5 M20 2.5 1.5 M24 3.0 2.0.
How much thread protrude from a nut?
How many threads should protrude through a nut in an optimal joint? The generally accepted answer is 1 to 3 threads. Most externally threaded fastener blanks are manufactured with a header point prior to thread rolling, which leaves the first 1 to 2 threads undersized for ease of assembly.
What is the minimum bolt tensile strength for commercial bolts?
Commercial low carbon steel bolts used in the steel industry are manufactured to AS 1111.1 which calls for a minimum tensile strength of 400 MPa, with the property class designation 4.6. Design stresses are specified in AS 4100.
How do you screw into a hollow aluminum?
To use self-tapping screws, place the screw directly on the aluminum sheet. Stabilize the screw so it doesn’t tilt as it goes in and twist the screw into the metal. Let it turn until it goes all the way through, as the threads and the sharp point make their own hole.
