Hexagon head cap screws, also called hex bolts or hex head cap screws, are threaded fasteners with a six-sided head. They are installed with a wrench or a socket. Compared to other fasteners, hex head cap screws provide a larger surface-bearing area for better clamping.
What is the difference between hex bolt and hex screw?
The most basic difference between a cap screw and a bolt is the way in which these fasteners are installed. Technically, a bolt is installed by turning a nut to tighten the fastener, while a cap screw in installed by turning the head of the bolt to assemble and tighten.
What are hex screws used for?
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.
What is a Grade 2 hex bolt?
Grade 2 hex head bolts are made from low to medium strength carbon steel and offer a tensile strength of 60,000 to 74,000 psi, depending on the diameter. Contractors, designers, OEMs and maintenance staff turn to grade 2 steel fasteners for non-critical joints and applications, mainly because of affordability.
What are those hexagon screws called? – Related Questions
Is Grade 2 or Grade 8 better?
Its medium-carbon alloy steel has been quenched and tempered, ultimately making it possible to achieve an impressive tensile strength of 150,000 psi, compared to a grade 2 bolt’s 64,000 psi. In other words, a grade 8 bolt is more than twice as strong as a grade 2 SAE American Grade bolt.
Is grade 5 stronger than Grade 2?
Grade 2 is a standard hardware grade steel. This is the most common grade of steel fastener and is the least expensive. Except a possible manufacturer’s mark,Grade 2 bolts have no head marking. Grade 5 bolts are hardened to increase strength and are the most common bolts found in automotive applications.
What grade is a hex bolt?
Hex bolts (six sided heads) are the industry standard for fasteners with forged heads. ASTM A307 grade A bolts, all SAE hex bolts, and several other common specifications require a standard (finished) hex head.
Is a Grade 2 bolt better than a Grade 5?
There are several grades of bolts but the three common grades for SAE are 2, 5 and 8. The common class (grades) for metric are 5.8, 8.8, 10.9 and 12.9. Each grade has a specific bolt strength. No matter the system used to grade the bolts, the higher number means the stronger the bolt.
Is A307 a Grade 2?
You will often hear about A307 and Grade 2 bolts as being equivalent. While they are small differences they each are referred to as “low carbon” fasteners. A307 is an ASTM (industrial) spec, while Grade 2 is an SAE J429 Grade 2 (automotive) spec.
What do bolt grades mean?
Bolt Grades Explained
The grade of a bolt determines the maximum amount of stress that the bolt can handle. Tensile strength is the amount of pull the bolt can withstand before breaking.
What is the toughest grade bolt?
A grade 8 bolt is the highest grade SAE bolt. Grade 8 bolts have a minimum tensile strength of 150,000 PSI. As a comparison, the ASTM A325 bolt is roughly equivalent to the SAE grade 5.
Is stainless steel stronger than Grade 8?
Despite the popular belief, a stainless steel bolt is actually weaker than a grade 8 bolt. In fact, according to the Society of American Engineers (SAE), grade 8 bolts are the strongest and hardest hex bolt you would want to use in constructions or the automotive industry.
What is the hardest bolt you can buy?
Grade 8 is the hardest, Grade 5 is medium, and Grade 2 is the softest. This is the most common grade of steel fastener and is the least expensive. Grade 2 bolts have no head marking, although sometimes a manufacturer’s mark is present.
Is Grade 8 or Grade 5 stronger?
Grade 8 bolts have been hardened more than grade 5 bolts. Thus they are stronger and are used in demanding applications such as automotive suspensions. Grade 8 bolts have 6 evenly spaced radial lines on the head. Grade G is roughly equivalent to Grade 8.
What metal screw is strongest?
The most durable material for screws and fasteners is titanium. Titanium fasteners are common within the aerospace industry and other heavy-duty applications. Titanium fasteners are also used in medical applications like bone screws.
What does JH on a bolt mean?
What does SB mean on a bolt?
• SB = Structural Bolting Bolts and nuts compliant with DIN EN 15048 must bear the special “SB” mark.
What do 3 hash marks on a bolt mean?
Three radial lines will indicate an SAE grade 5 fastener, while six radial lines will indicate an SAE grade 8 fastener. These are the most common grades, but there are others.
Is Grade 8 or 10.9 stronger?
They are very similar. Grade 8 is an SAE designation. 10.9 is a metric designation. But the two systems yield the same holding strength.
Is Titanium stronger than Grade 8?
Our Titanium Fasteners are Stronger than Grade 8 Steel. Welcome to Smith Ti where are fasteners are stronger that Grade 8 steel. We thought you might like to know why we lead the way in manufacturing the strongest and nicest looking fasteners on the market.