What are bolts with a square head called?
At one time, square head bolts (aka square bolts) were the industry standard before being replaced by hex head bolts. Now, they are commonly chosen for aesthetic reasons to create a rustic look in new buildings or to match existing fasteners in an old building.
Why do some bolts have square heads?
History. Early nuts were made of wood and were used with wooden pegs. The square shape made it possible to form a tool to tighten nut in place. Later wooden fasteners were replaced by steel ones, and modern nuts are forged from steel stock bars and used along with steel bolts.
Do they make square sockets?
Try using a socket that fits the number of corners on your square head bolts. These Square Socket or 4-point sockets fit many of the common head sizes we sell. Sockets for square head bolts and Square Nuts.
Why are English called square heads?
Usage notes. ‘Squarehead’ is a literal translation of the term tête carrée used by French-Canadians to describe English-Canadians, especially those who do not or prefer not to speak French.
How do you measure a square head bolt?
Square Head Bolts offer a large bearing area for positive gripping with an open or adjustable wrench. Length is measured from under the head. Head width or wrench size is measured across the flats.
Where are square head bolts used?
Square bolts are now most commonly used for aesthetic purposes to provide a rustic look in a new structure or to match existing fasteners in an older structure. Square lag screws are also used for these purposes. Crossarm or machine bolts are commonly supplied for the utility industry and included an added cone point.
What is a square head used for?
The square head is arguably the most commonly seen part of the combination square set. It is traditionally used for determining whether angles are at right angles or 45 degree angles (such as a 45 degree mitre in a mitre joint).
Will a 12 point socket work on a square bolt?
the triple square is a 12 pt socket but the points are all 90 degrees and it will work on square fasteners. They will work providing the nut is not to tight. Sockets that work better have a relief in the apex of each cutaway in the socket so that pressure is more on the flank or side of the nut near the corner.
What kind of screw has a square head?
These metric screws have a square head, so you can turn them by hand or use a wrench for more torque. Also known as half dog-point set screws, they have a protruding tip that locks within a mating hole or slot to keep parts aligned.
What is a Grade 8 screw used for?
Large flat sides make these screws easy to grip with a wrench and keep them from rotating in square holes. Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems.
What are high-strength screws used for?
For use in high-strength fastening applications. Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems. They are at least 25% stronger than medium-strength steel screws. The flange distributes pressure over the surface, eliminating the need for a washer.
What is a carriage bolt made of?
Carriage bolts have a smooth, rounded head for a finished look. The square neck keeps these bolts from turning when tightening a nut. Made from Grade 8 steel, these screws can be used in high-stress applications, such as valves, pumps, motors, and automotive suspension systems.