What is the classification of bolt?

There are three main systems of bolt classification: SAE, Metric and ASTM. SAE Bolt Grades—The standards for bolt strength grades in the U.S. are set according to a system developed by the SAE (Society of Automotive Engineers). The SAE marking system uses raised dashes on the bolt head to indicate strength.

How do you classify nuts and bolts?

There are many types of bolts and hardware nuts. Most, if not all, bolt types have machine threads. A threaded bolt screws into nuts to hold or fasten materials together. Bolt types include eye bolts, wheel bolts and machine bolts while types of nuts include cap nuts, expansion nuts and u-nuts.

How many types of nuts and bolts are there?

There are many types of bolts and hardware nuts. Most, if not all, bolt types have machine threads. A threaded bolt screws into nuts to hold or fasten materials together. Bolt types include eye bolts, wheel bolts, and machine bolts while types of nuts include cap nuts, expansion nuts, and u-nuts.

What is a Class 8 bolt?

Grade 8 – Grade 8 bolts are made from medium carbon alloy steel. The bolts of this grade feature 6 radial lines. The nominal size of the grade 8 bolts can be from 1/4″ to 1 1/2″. The minimum yield strength of this grade bolt is 130,000 psi.

What is bolt and its types?

Introduction. A bolt is a type of fastener, usually made from metal, that commonly comprises a head at one end, a chamfer at the other, and a shaft characterised by an external helical ridge known as a ‘thread’. Bolts are typically used to hold materials or objects together, or to position objects.

What is a Grade 5 bolt?

Grade 5. Manufactured from medium carbon steel and hardened for greater strength and durability, a grade 5 bolt is distinguished by 3 radial lines and promises tensile strengths between 105,000 and 120,000 psi. They are most commonly found in automotive applications or those that require medium strength.

What is a class 10 nut?

Class 10. This is a metric nut grading similar to the SAE grade 8 classification, which is used in conjunction with Class 10.9 bolts. This strength of nut is used in automotive, and structural industries, as well as in high temp applications.

What grade bolt is strongest?

grade 8
Grade 9 structural bolts, also known as grade 9 hex cap screws, are one the strongest structural bolts that can be used today. While the typical grade 8 bolt has a tensile strength of 150,000 PSI, a grade 9 bolt has a tensile strength of 180,000PSI.

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.

How are bolts and nuts usually named in automotive terminology?

In automotive technology, bolts and nuts are named after the parts they hold. For instance, the bolts holding the cylinder head on the block are called cylinder head bolts. The bolts on an engine connecting rod are called connecting rod bolts. Bolts and nuts come in various sizes, grades (strengths), and thread types.

What type of metal are nuts and bolts?

Steel is the most common material used for making nuts & bolts & fastener material. These are available plain. They are also available with various surface treatments. These may include such as zinc plating, galvanization, & chrome plating.

How do you categorize a screw?

General. Fasteners are identified by four or five attributes; Type, Material, Diameter, Length, and Thread Pitch or Count (machine thread fasteners only).

What type of materials are nuts and bolts used to join?

Nuts and bolts or fasteners as they are also known are used to join pieces of wood, metal, plastic and other materials together, either permanently or temporarily. Many steel structures, including huge buildings are simply bolted together.

What are the properties of nuts and bolts?

Other mechanical properties of steel bolts include:
  • Fatigue strength. The maximum stress a fastener can endure for a specific number of cycles before failing.
  • Torsional strength. The torque load at which a fastener fails by becoming twisted off at its axis.
  • Hardness. …
  • Ductility. …
  • Toughness.

Which material is used for bolt?

steel
The most common material for mechanical fasteners, such as bolts and screws, is steel. Different grades of steel are available, depending on the strength required. If rust or corrosion is a concern, stainless steel, brass, or titanium may be used.

What is the difference between Grade 2 and Grade 5 bolts?

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 are characteristics of a bolt?

The bolt consists of a head and a cylindrical body with screw threads along a portion of its length. The nut is the female member of the pair, having internal threads to match those of the bolt. Washers are often used to prevent loosening and crushing.

What is tensile strength of bolt?

Tensile strength is the mechanical property most widely associated with standard threaded fasteners. Tensile strength is the maximum tension-applied load the fastener can support prior to fracture. The tensile load a fastener can withstand is determined by the formula P = St x As.

What is the difference between nut and bolt?

A nut is a small metallic piece of metal with a spiral cut groove that runs around a hole in its center while a bolt is a metallic piece with a round stem as its body and threaded into one end. Bolts have different length sizes while nuts have a standard size.

What is the function of bolt?

The function of a bolt is to provide a clamp load or preload (Fp) to sufficiently compress and stress the gasket and resist the parting forces exerted by the hydrostatic end force and other external loads.

Why are there different types of bolts?

Some are designed for heavy loads while others are for non-load bearing uses. Characterised by its six-sided head, there are many different types of hex bolts. Typically used in machinery and construction applications and available fully or partially threaded.

What are bolts called?

The term bolt is usually used for a fastener which has only part of its shaft threaded. Fasteners with their entire shaft threaded are normally called screws. The unthreaded part of a bolts shaft is called the shank.

What are bolt sizes?

A bolt’s size is classified based on a number of dimensions, namely the bolt’s diameter, length of shank, thread pitch, grade, thread length and head size. Bolts can me specified in metric using millimeters, but the standard, internationally-recognized descriptions of bolt sizes are in inches.