What size is a 8.8 bolt?

Metric hex bolts, Zinc plated class 8.8 steel, 8mm x 1.0mm x 60mm – Bolt Depot.

What does 8.8 mean on a bolt?

The two figures indicate the tensile and yield strengths of the bolt or screw. In the case of a 8.8 grade bolt the first figure signifies that the Tensile Strength is at least 800MPa. The second figure signifies that the fastener will begin to yield at 80% of the Ultimate Tensile Strength, i.e. at least 640MPa.

What grade is an 8.8 bolt?

Class 8.8 is similar to grade 5. Zinc plated for moderate corrosion resistance. A tempered medium carbon steel. Class 10.9 is stronger than class 8.8.

How strong is a Class 8.8 bolt?

Bolt Grade Markings and Strength Chart

Grade and Material	Mechanical Properties
Min. Tensile Strength (psi)
Class 8.8 Medium carbon steel, quenched and tempered	800
830
Class 10.9 Alloy steel, quenched and tempered	1040

Is 8.8 bolt high tensile?

High tensile steel bolts

Grade 8.8 high tensile steel is often referred to as the structural grade for bolts. It is the most common form of high tensile material and is usually stocked in plain finish or zinc. It can be plated in many other coatings.

Are grade 8.8 bolts Galvanised?

General grade high strength bolts (ISO grade 8.8) to BS 4395 Part 1, (equivalent to ASTM A325) can be galvanized without difficulty.

How much weight can a 8.8 bolt hold?

In round terms it is in 10’s of kg per square millimeter of the bolt. 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.

What does 8.8 s mean?

Category 8.8/S refers to any bolt of Property Class 8.8, tightened using a standard wrench to a ‘snug- tight’ condition in the same way as for category 4.6/S. Essentially, these bolts are used as higher grade commercial bolts in order to increase the capacity of certain connection types.

Is Grade 8 or 8.8 Stronger?

Table 1.

Grade/Class	Strength
Grade 5	Medium strength.
Grade 8	High strength.
Metric Class 4	Similar to Grade 2.
Metric Class 8.8	Similar to Grade 5.

Is 8.8 bolt stainless steel?

Grade 8.8 Bolts belong to the DIN 933 grade 8.8 standard. This is a structural grade for bolts. This is a medium carbon steel bolt specification. These bolts are heat treated by quenched and tempered methods.

What grade is the strongest bolt?

The strongest commercial-quality bolt is grade 8, marked by six raised dashes, its medium-carbon alloy steel has been quenched and tempered to achieve a tensile strength of 150,000 psi.

What does 1364 mean?

IS 1364 was originally published in 1960 and first revised in 1967. Subsequent to the publication of 1967 edition, many changes had been agreed upon at international level which have been reflected in IS 1367 series of standards covering ‘Technical supply conditions for threaded steel fasteners‘.

What bolt is the strongest?

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.

Can you galvanize Grade 8 bolts?

By reviewing Table 1 below, it is clear that specifications ASTM A490, ASTM A354 grade BD, and SAE J429 grade 8 are all potentially susceptible to hydrogen embrittlement and should therefore not be hot-dip galvanized.

How can you tell if a bolt is galvanized?

The steel is put in a big bath, where the coating is applied. If it’s galvanised, it will be dull grey and a little rough. A zinc plated product will be shiny and smooth.

Are bolts hot dip galvanized?

SELF-HEALING EFFECTS OF HOT DIP GALVANIZED FASTENERS

An example of this phenomenon is the screw thread of hot dip galvanized nuts that are tapped after galvanizing. The zinc layer on the bolt thread completely overtakes the protection of the uncoated nut thread.

Is an M8 bolt 8mm wide?

But, to answer your Q – an M8 bolt will fit in an 8mm hole.

What size screw is M8?

Metric clearance and tapping drill hole sizes.

Size	Clearance Hole mm	Tapping Drill (std Pitch)
M6	6.5	5.0 mm
M8	9	6.75 mm
M10	11	8.5 mm
M12	14	10.25 mm

How strong is an M8 bolt?

From the table at right, for a strength class of 10.9 and a maximum allowable load of 200 kgf, the suitable bolt is a 318［kgf］M8.

What is a m20 bolt?

Here’s what the description means… M = Metric thread designation. 8 = Nominal diameter, in millimeters. 1.0 = Pitch (distance from thread to thread), in millimeters. 20 = Length, in millimeters (see below)

Can you weld grade 8.8 bolts?

In general, fasteners, whether grade 4.6 or Grade 8.8, are not supplied as weldable items in their respective product standards and should not be welded.

What are the grades of metric bolts?

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 an 8.8 bolt a grade 8 bolt?

In terms of strength, 8.8 is equivalent to Grade 5, 10.9 is equivalent to grade 8. There are also 12.9 metric bolts, which are a little stronger than 10.9, and are a higher alloy steel.

What does JH mean on a bolt head?

Bolt Head Markings: What do they mean? | Fasteners 101 – YouTube

Is Grade 8 or 12.9 stronger?

Used in high stress environments, grade 12.9 fasteners are the highest class of metric cap screws. Where Grade 8 fasteners have a 150,000 psi tensile strength, 12.9 fasteners have a 180,000 psi tensile strength, making them more durable than the grade 5.

How strong is A2 bolt?

A2-70 Stainless Steel Fastener is recognized by 2 ways, A2 which describe it as being from SS 304 family and 70 which classifies its strength. When we say A2-70 it generally means that the bolt / screw is from SS 304 grade and has an ultimate tensile strength as 70 kg or 700 n/mm2.

Will Grade 8 bolts rust?

Grade 8 Steel Bolts

Grade 8 bolts have 6 evenly spaced radial lines on the head.” Unlike stainless steel, which is highly resistant to corrosion, steel, however reinforced, will oxidize over time and rust. Grade 8 bolts that are not galvanized or plated with yellow zinc, however, are cheaper.

What are black bolts?

The term “black bolt” is an industry term for plain finish or no finish bolts. These bolts offer no corrosion resistance and will rust over time. If you are looking for a decorative coating that is actually black, you will want to specify that they are actually coated and state which kind of coating is necessary.

Are stainless steel screws stronger than zinc?

Though some Zinc alloys can be very strong, overall stainless steel is stronger. However, zinc is a heavy element, and when alloyed with other metals it provides better corrosion resistance, stability, dimensional strength and impact strength.

Are bolts stronger than screws?

Is a Bolt Stronger Than a Screw? Yes, bolts provide greater holding strength than screws.

What kind of steel are Grade 8 bolts made of?

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 are Grade 8 bolts used for?

Grade 8 fasteners are considered hi-strength / high-tensile fasteners and are used in many highly industrial applications such as machinery, valves, pumps, vessels, motors, tractors, and even tanks… Although it may seem like a bolt is a bolt, there are significant differences in how each bolt is manufactured.

What is the gold plating on bolts?

Zinc Chromate plated bolts were used to attach the fuel pump to the engine. This is a yellow/gold plating often seen with a pink and green rainbow effect visible on the plating surface. Items with this coating are first plated with zinc, then treated with a dichromate coating which gives it the yellow/gold appearance.

How can you tell if a bolt is grade 8?

English bolts have radial lines on their head to identify the grade, or strength class. The number of lines on the bolt head is 2 less than the actual grade. So, for example, a grade 5 bolt will only have 3 radial lines on its head. A grade 8 bolt will have 6 radial lines on its head.

Is a grade 8 bolt stronger than a Grade 5 bolt?

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 nuts are used with Grade 8 bolts.

What is galvanized screw?

What Are Galvanized Screws? Galvanized screws are characterized by the presence of a protective zinc shell that’s achieved by submerging the screws in molten zinc. Known as hot-tip galvanizing, this finishing process adds a layer of zinc over the surface of a screw.

Are galvanized bolts thicker?

Coating thickness is primarily determined by the steel chemistry and thickness of the fastener material. Hot-dip galvanized coatings are much thicker than other cathodic protection systems such as zinc-plated and electroplated coatings, and painted coatings offer only barrier protection.

Will magnets stick to galvanized metal?

Galvanized steel is magnetic because the base steel metal is magnetic. Galvanized steel is covered with a thin layer of zinc and this process does not interfere with the magnetic strength of the steel.

Is code for hot dip galvanizing?

or IS 13229: 1991 Zinc for galvanizing. ‘

What does hot dipped galvanized look like?

HDG steel may have a variety of different initial appearances, including bright and shiny, dull, spangled, mottled, or matte gray. … Regardless of the initial appearance, all galvanized steel parts will take on a uniform matte gray appearance upon exposure to the environment, typically within six months to two years.

How do you Galvanise bolts?

Hot-Dip Galvanizing – YouTube